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[[File:Mayonnaise (1).jpg|thumb|Jar of pale-yellow mayonnaise]]
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'''Mayonnaise''' ({{IPAc-en|ˈ|m|eɪ|ə|n|eɪ|z}}, {{IPAc-en|ˌ|m|eɪ|ə|ˈ|n|eɪ|z}} or in [[AmE]] also {{IPAc-en|ˈ|m|æ|n|eɪ|z}}, and often abbreviated as '''mayo''' {{IPAc-en|ˈ|m|eɪ|oʊ}}) is a thick, creamy [[salad dressing|dressing]] often used as a [[condiment]].<ref name=Merriam-Webster>{{cite web|url=http://www.merriam-webster.com/dictionary/mayo |title=Mayo - Definition and More from the Free Merriam-Webster Dictionary |publisher=Merriam-webster.com |date= |accessdate=14 February 2015}}</ref> It is a stable [[emulsion]] of [[oil]], [[egg]] [[yolk]], and either [[vinegar]] or [[lemon juice]],<ref name=def>"Mayonnaise is an emulsion of oil droplets suspended in a base composed of egg yolk, lemon juice or vinegar, which provides both flavor and stabilizing particles and carbohydrates." ''On Food and Cooking,'' [[Harold McGee]], [[Charles Scribner's Sons|Scribner]], New York, 2004, p.&nbsp;633.</ref> with many options for embellishment with other herbs and spices. [[Protein]]s and [[lecithin]] in the egg yolk serve as [[emulsifier]]s in both mayonnaise and [[hollandaise sauce]].<ref>{{cite web|url=http://www.exploratorium.edu/cooking/eggs/eggscience.html |title=Science of Eggs: Egg Science |publisher=Exploratorium.edu |date= |accessdate=17 November 2011}}</ref> Commercial [[#Mayonnaise alternatives|egg-free alternatives]] are available for [[Veganism|vegans]] and others who want to avoid [[animal products]] and [[cholesterol]], or who are [[Egg allergy|allergic to eggs]].<ref name="eggfreemayo">{{cite book|last1=Moran|first1=Victoria|last2=Moran|first2=Adair|title=Main Street Vegan: Everything You Need to Know to Eat Healthfully and Live Compassionately in the Real World|date=2012|publisher=Penguin|isbn=9781101580622|page=168|url=https://books.google.com/books?id=RSyom6UrjlUC&pg=PT168&redir_esc=y#v=onepage&q&f=false|accessdate=28 November 2015}}</ref>
| name = Ketchup
| image = Ketchup-01.jpg
| caption =A dish of tomato ketchup
| alternate_name = Catsup, ketsup, condiment.
| country =
| region =
| creator =
| course =
| type = [[Condiment]]
| served =
| main_ingredient = [[Tomato]]es, [[sugar]] or [[high fructose corn syrup|high fructose]] [[corn syrup]], [[vinegar]], salt, [[spice]]s and [[seasoning]]s
| variations =
| calories =
| other =
}}


Lightmaw is cucked.
'''Ketchup''', or '''catsup''' or '''ketsup''' , is a [[table sauce]]. Traditionally, recipes featured ketchups made from egg whites, mushrooms, oysters, mussels, walnuts, or other foods,<ref name= "Smith1996">{{cite book|last=Smith |first= Andrew F. |title=Pure Ketchup: A History of America's National Condiment, with Recipes |url= https://books.google.com/books?id=hAq_EvcAIW4C |accessdate= 1 October 2013 |year= 1996 |publisher=[[University of South Carolina Press]] |isbn= 978-1-57003-139-7 |page= 17}}</ref><ref>{{cite web | url = http://www.history.com/news/hungry-history/ketchup-a-saucy-history | title = Ketchup: A Saucy History | work = History | date = 2012-07-20 | accessdate = 2013-03-15}}</ref> but in modern times the unmodified term usually refers to ''tomato ketchup''. '''Tomato sauce''' is the more common term in Australia, New Zealand, and India, and is almost exclusively used in South Africa.


Mayonnaise varies in color, but is often white, cream, or pale yellow. It may range in texture from that of light cream to a thick [[gel]]. In countries influenced by [[French culture]], [[mustard (condiment)|mustard]] is also a common ingredient, but the addition of mustard turns the sauce into a [[remoulade]] with a different flavor and the mustard acts as an additional emulsifier.<ref>{{cite web|url=http://www.practicalchemistry.org/experiments/emulsifiers,125,EX.html |title=Emulsifiers&nbsp;— Experiments |publisher=Practical Chemistry |date= |accessdate=17 November 2011}}</ref><ref>{{cite web|url=http://www.scienceprojectideas.co.uk/making-emulsion.html |title=Making an Emulsion |publisher=Science Project Ideas |date=1 October 2010 |accessdate=17 November 2011}}</ref>
Ketchup is a sweet and [[tangy]] [[sauce]], typically made from [[tomato]]es, sweetener, [[vinegar]], and assorted [[seasoning]]s and [[spice]]s. Seasonings vary by recipe, but commonly include [[onion]]s, [[allspice]], [[cloves]], [[cinnamon]], [[garlic]], and sometimes [[celery]].<ref name="madehow">{{cite web | url = http://www.madehow.com/Volume-2/Ketchup.html | title = How ketchup is made | work = Made how | accessdate = 2010-05-27}}</ref>


==History==
[[Heinz]] tomato ketchup is the market leader, with an 82% market share in the UK and a 60% share in the US market.<ref name="Ecologist">{{cite web |title= Behind the Label: tomato ketchup |url= http://www.theecologist.org/green_green_living/behind_the_label/686422/behind_the_label_tomato_ketchup.html |website= The Ecologist|accessdate= 8 July 2014}}</ref><ref>{{cite web
[[File:Ingredients maonesa.jpg|thumb|upright|Standard ingredients and tools to make mayonnaise]]
| url = http://www.cnbc.com/id/100464841
The word mayonnaise was not used for a dressing before the start of the 19th century. The earliest reference appears to be by [[Alexandre Viard]] (1806), who however never quite gives a recipe for the dressing itself.<ref>{{cite web|title=Le cuisinier impérial, n.|url=https://books.google.com/books?id=sI4EAAAAYAAJ&dq=inauthor%3Aviard%20mayonnaise&pg=PA342#v=onepage&q&f=false|work=Le cuisinier impérial|publisher=Barba (1806)|accessdate=24 November 2014}}</ref> At that point, the sauce was made with [[aspic]] or jelly, rather than an egg emulsion. In 1815, [[Louis Eustache Ude]] wrote:
| title = The Ketchup War that Never Was: Burger Giants' Link to Heinz
| work = CNBC.com
| date = 2013-02-15
| accessdate = 2016-02-20
}}</ref>


<blockquote>No 58.—Mayonnaise. <br>
Tomato ketchup is often used as a [[condiment]] to various dishes that are usually served hot: [[French fries]], [[hamburger]]s, [[sandwich|hot sandwich]]es, [[hot dog]]s, [[Egg (food)|cooked eggs]], and grilled or fried meat. Ketchup is sometimes used as the basis for, or an ingredient in, other sauces and dressings, and it is also used as an [[Flavoring|additive flavoring]] for snacks like [[potato chips]].


Take three spoonfuls of [[Allemande sauce|Allemande]], six ditto of aspic, and two of oil. Add a little [[tarragon]] vinegar, that has not boiled, some pepper and salt, and minced [[Sauce ravigote|ravigotte]], or merely some parsley. Then put in the members of fowl, or fillets of soles, &c. Your mayonnaise must be put to ice; neither are you to put the members into your sauce till it begins to freeze. Next dish your meat or fish, mask with the sauce before it be quite frozen, and garnish your dish with whatever you think proper, as beet root, jelly, nasturtiums, &c.<ref>{{cite web|url=https://books.google.com/books?id=xYwEAAAAYAAJ&dq=aspic%20mayonnaise&pg=PA34#v=onepage&q&f=false |title=The French Cook, Or, The Art of Cookery: Developed in All Its Branches - Louis Eustache Ude - Google Books |publisher=Books.google.com |date= |accessdate=May 30, 2015}}</ref></blockquote>
==History==


In a 1820 work, Viard describes something like the more familiar emulsified version:
===Pickled fish and spices===
<blockquote>This sauce is made to "take" in many ways: with raw egg yolks, with gelatine, with veal or veal brain glaze. The most common method is to take a raw egg yolk in a small [[Terrine (cookware)|terrine]], with a little salt and lemon juice: take a wooden spoon, turn it while letting a trickle of oil fall and stirring constantly; as your sauce thickens, add a little vinegar; put in too a pound of good oil: serve your sauce with good salt: serve it white or green, adding green of ravigote or green of spinach.<br>
In the 17th century, the Chinese mixed a concoction of pickled fish and spices and called it (in the [[Amoy dialect]]) kôe-chiap or kê-chiap (鮭汁, [[Standard Chinese|Mandarin Chinese]] guī zhī, [[Cantonese]] gwai<sup>1</sup> zap<sup>1</sup>) meaning the [[brine]] of [[Fermented fish|pickled fish]] (鮭, salmon; 汁, juice) or shellfish.<ref name=OED/> By the early 18th century, the table sauce had made it to the Malay states (present day Malaysia and Singapore), where it was tasted by English colonists. The Indonesian-Malay word for the sauce was ''kecap'' (pronounced "kay-chap"). That word evolved into the English word "ketchup".<ref name="Merriam-webster.com">{{cite web|url=http://www.merriam-webster.com/dictionary/ketchup |title=Ketchup - Definition and More from the Free Merriam-Webster Dictionary |publisher=Merriam-webster.com |date= |accessdate=2011-08-26}}</ref> English settlers then took ketchup with them to the American colonies.<ref name="Smith1996"/>
This sauce is used for cold fish entrees, or salad of vegetables cooked in salt water.<ref>{{cite web|title=Le cuisinier royal, n.|url=https://books.google.com/books?id=nfQ_AQAAMAAJ&dq=inauthor%3Aviard%20mayonnaise&pg=PA62#v=onepage&q&f=false|work=Le cuisinier royal|publisher=Barba (1820)|accessdate=24 November 2014}}</ref></blockquote>


In 1808, [[Alexandre Balthazar Laurent Grimod de La Reynière|Grimod de La Reynière]] referred to a "bayonnaise" sauce: "But if one wants to make from this cold chicken, a dish of distinction, one composes a bayonnaise, whose green jelly, of a good consistency, forms the most worthy ornament of poultry and fish salads."<ref>{{cite book|last1=de La Reynière|first1=Grimod|title=Manuel des amphitryons|date=1808|publisher=Capelle et Renand|url=https://books.google.com/books?id=Z4AEAAAAYAAJ&dq=bayonnaise+sauce&pg=PA99&redir_esc=y#v=onepage&q&f=true|accessdate=26 November 2014}}</ref>
The term ''Ketchup'' was used in 1690 in the ''Dictionary of the Canting Crew'' which was well acclaimed in North America.<ref>{{cite web | url=http://www.heinz.com/our-food/products/ketchup.aspx | title=History of A History of Heinz® Tomato Ketchup | publisher=Heinz | accessdate=27 January 2015}}</ref> The spelling "catchup" may have also been used in the past.<ref>{{Cite book|title=Pure Ketchup: A History of America's National Condiment, with Recipes|last=Smith|first=Andrew F.|publisher=Univ of South Carolina Press|year=1996|isbn=9781570031397|location=|pages=|via=}}</ref>


===Mushroom ketchup===
==Anecdotal origins==
One of the most common places named as the origin of mayonnaise is the town of [[Mahón]] in [[Minorca|Menorca]], Spain, where it was then taken to France after [[Armand de Vignerot du Plessis]]'s [[Battle of Minorca (1756)|victory over the British]] at the city's port in 1756. According to this version, the sauce was originally known as ''salsa mayonesa'' in Spanish and ''maonesa'' (later ''maionesa'') in [[Catalan language|Catalan]] (as it is still known in Menorca), later becoming ''mayonnaise'' as it was popularized by the [[French cuisine|French]].<ref name="trutt">{{cite book|last1=Trutter|first1=,|last2=Beer|first2=Günter|title=Culinaria Spain|date=2008|publisher=H.F. Ullmann|location=Germany|isbn=9783833147296|page=68|edition=Special}}</ref>
{{main article|Mushroom ketchup}}
[[File:Mushroom ketchup (homemade) - (cropped).jpg|thumb|175px|Homemade [[mushroom ketchup]] in a plastic tub]]
In the United Kingdom, preparations of ketchup were historically and originally prepared with [[Edible mushroom|mushrooms]] as a primary ingredient, rather than tomatoes.<ref name="Cooke"/><ref name="Bell"/><ref name="Branston"/> Ketchup recipes began to appear in British and then American cookbooks in the 18th century. In a 1742 London cookbook, the fish sauce had already taken on a very British flavor, with the addition of shallots and [[Edible mushroom|mushrooms]]. The mushrooms soon became a main ingredient, and from 1750 to 1850 the word ketchup began to mean any number of thin dark sauces made of mushrooms or even walnuts.<ref name="The Cosmopolitan Condiment">{{cite web | title=The Cosmopolitan Condiment|url=http://www.slate.com/articles/life/food/2012/05/ketchup_s_chinese_origins_how_it_evolved_from_fish_sauce_to_today_s_tomato_condiment.html | work=slate.com | accessdate=2015-01-30}}</ref> In the United States, [[mushroom ketchup]] dates back to at least 1770, and was prepared by British colonists in "English speaking colonies in North America".<ref>{{cite book | url=https://books.google.com/books?id=hAq_EvcAIW4C&pg=PA16 | title=Pure Ketchup | publisher=Univ of South Carolina Press | author=Smith, Andrew F. | year=1996 | pages=16–17 | isbn=1570031398}}</ref> In contemporary times, mushroom ketchup is available in the UK, although it is not a commonly used condiment.<ref name=Condiments>[http://www.independent.co.uk/life-style/condiments-to-the-chef-1098328.html The Independent] 5 June 1999, Condiments to the Chef</ref>


The ''[[Larousse Gastronomique]]'' suggests: "Mayonnaise, in our view, is a popular corruption of ''moyeunaise'', derived from the very old French word ''moyeu'', which means yolk of egg."<ref>''Dictionnaire de l'Académie française, neuvième édition'', "3. Anciennt. Le jaune de l'œuf."</ref> The sauce may have been christened ''mayennaise'' after Charles de Lorraine, duke of Mayenne, because he took the time to finish his meal of chicken with cold sauce before being defeated in the [[Battle of Arques]].<ref>{{cite book|last1=Acton|first1=Johnny|last2=Adams|first2=Tania|last3=Packer|first3=Matt|title=The Origin of Everyday Things|date=2006|publisher=Sterling|location=New York|isbn=978-1-4027-4302-3|page=151}}</ref>
===Tomato ketchup===
[[File:Different ketchup in a plate 122425.jpg|thumb|Tomato ketchup and other [[condiment]]s]]
[[File:Tomato Casual.jpg|thumb|right|223px|Tomatoes and tomato ketchup]]
Many variations of ketchup were created, but the tomato-based version did not appear until about a century later after other types. One version of the recipe was created by Sandy Addison and published in an American cookbook, {{Citation|title=The Sugar House Book}}.<ref>{{Citation|title = The origin of ketchup & the first recipe|url=http://www.matsecooks.com/the-origin-of-ketchup-and-the-first-recipe/ | publisher = Matse cooks}}.</ref>
# ''Get [the tomatoes] quite ripe on a dry day, squeeze them with your hands till reduced to a pulp, then put half a pound of fine [[table salt|salt]] to one hundred tomatoes, and boil them for two hours.''
# ''Stir them to prevent burning.''
# ''While hot press them through a fine [[colander|sieve]], with a silver spoon till nought but the skin remains, then add a little [[mace (spice)|mace]], 3 [[nutmeg]]s, [[allspice]], [[clove]]s, [[cinnamon]], [[ginger root|ginger]], and [[Black pepper|pepper]] to taste.''
# ''Boil over a slow fire till quite thick, stir all the time.''
# ''Bottle when cold.''
# ''One hundred tomatoes will make four or five bottles and keep good for two or three years.''


According to Trutter ''et al.'': "It is highly probable that wherever olive oil existed, a simple preparation of oil and egg came about&nbsp;— particularly in the Mediterranean region, where ''[[aioli]]'' (oil and [[garlic]]) is made."<ref name=trutt/>
This early recipe for "Tomata Catsup" from 1817 still has the anchovies that betray its fish-sauce ancestry:<ref name= "The Cosmopolitan Condiment"/>
# ''Gather a gallon of fine, red, and full ripe tomatas; mash them with one pound of salt.''
# ''Let them rest for three days, press off the juice, and to each quart add a quarter of a pound of anchovies, two ounces of shallots, and an ounce of ground black pepper.''
# ''Boil up together for half an hour, strain through a sieve, and put to it the following spices; a quarter of an ounce of mace, the same of allspice and ginger, half an ounce of nutmeg, a drachm of coriander seed, and half a drachm of [[cochineal]].''
# ''Pound all together; let them simmer gently for twenty minutes, and strain through a bag: when cold, bottle it, adding to each bottle a wineglass of brandy. It will keep for seven years.''
By the mid-1850s, the anchovies had been dropped.<ref name="The Cosmopolitan Condiment"/>


According to the ''[[Oxford English Dictionary]]'', the term mayonnaise was in use in English as early as 1823 in the journal of [[Marguerite Gardiner, Countess of Blessington|Lady Blessington]].<ref>{{cite web|title=mayonnaise, n.|url=http://www.oed.com.libezproxy.open.ac.uk/Entry/115319|work=Oxford English Dictionary|publisher=OUP|accessdate=21 April 2011}}</ref>
James Mease published another recipe in 1812. In 1824, a ketchup recipe using tomatoes appeared in ''The Virginia Housewife'' (an influential 19th-century cookbook written by Mary Randolph, [[Thomas Jefferson]]'s cousin). American cooks also began to sweeten ketchup in the 19th century.<ref>Elizabeth Rozin (1994). [https://books.google.com/books?id=f8HfAAAAMAAJ&q=The+Primal+Cheeseburger&dq=The+Primal+Cheeseburger&hl=en&ei=P3pmTdnGF8H7lwee74n_AQ&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCcQ6AEwAA ''The Primal Cheeseburger.''] New York: Penguin books. ISBN 978-0-14-017843-2.</ref>


== Physical and chemical properties ==
As the century progressed, tomato ketchup began its ascent in popularity in the United States. Ketchup was popular long before fresh tomatoes were.<ref name="tomatogardeningguru1">{{cite web|title=Tomato History: From Poison to Obsession|url=http://www.tomatogardeningguru.com/history.html}}</ref> Many Americans{{who|date=August 2013}} continued to question whether it was safe to eat raw tomatoes. However, they were much less hesitant to eat tomatoes as part of a highly processed product that had been cooked and infused with vinegar and spices.<ref name="tomatogardeningguru1"/>
Traditional mayonnaise is a mixture of egg, vinegar, oil and spices (especially mustard). Mayonnaise made in this fashion typically contains 70–80% fat. Despite the high oil content relative to water, mayonnaise is an oil-in-water emulsion. This emulsion is formed by first mixing the eggs, vinegar and mustard and then slowly blending in the oil. This results in an emulsion consisting of a closely packed "foam" of oil droplets. By contrast, if the oil and aqueous phases are mixed all at once (as many novice cooks can attest) the result is a water-in-oil emulsion similar in viscosity to the oil from which it is made.


Oil may account for 75% or more of the total volume. This means that the oil droplets become distorted from their normal, spherical shape. The close packing of the droplets also allow them to interact very strongly with one another. It is a combination of these factors that gives traditional mayonnaise its high viscosity. The visco-elasticity of mayonnaise made with egg yolk reaches a maximum very quickly after preparation
Tomato ketchup was sold locally by farmers. Jonas Yerkes is credited as the first American to sell tomato ketchup in a bottle.<ref>{{cite book|last1=Skrabec Jr|first1=Quentin R. |title=H.J. Heinz a biography|date=2009|publisher=McFarland & Co.|location= Jefferson, NC|isbn=0-78645332-X|page=56|url=https://books.google.com/books?id=PxqCy0R-VzAC&pg=PA57|accessdate=26 January 2015}}</ref> By 1837, he had produced and distributed the condiment nationally.<ref>{{Citation|first=Quentin R|last=Skrabec|title=H.J. Heinz: a biography | publisher=McFarland & Co. | year = 2009 | page = 57}}></ref> Shortly thereafter, other companies followed suit. [[H. J. Heinz Company|F. & J. Heinz]] launched their tomato ketchup in 1876.<ref>{{cite web |url= http://www.heinz.com/our-company/about-heinz/history.aspx |title= Heinz - History |publisher=H.J. Heinz Co |accessdate= 27 July 2011}}</ref> [[Heinz Tomato Ketchup|Heinz tomato ketchup]] was advertised: "Blessed relief for Mother and the other women in the household!", a slogan which alluded to the lengthy and onerous process required to produce tomato ketchup in the home.<ref name= "Retro Food Fiascos: A Collection of Curious Concoctions">{{cite book |last= Casey |first= Kathy|title= Retro Food Fiascos: A Collection of Curious Concoctions |year=2004 |publisher= Collectors Press|isbn= 978-1-888054-88-0 |page=128 |url= http://www.amazon.com/Retro-Food-Fiascos-Collection-Concoctions/dp/1888054883}}</ref> With industrial ketchup production and a need for better preservation there was a great increase of sugar in ketchup, leading to our modern sweet and sour formula.<ref name="The Cosmopolitan Condiment" />


For a mayonnaise food system in which emulsifying agent has not been added to the food system yet, the observation is that oil floats on top of water forming two separate layers. Energy as mechanical force (e.g. shear shaking) must be supplied into the system to force the oil to enter the water phase as oil droplets.<ref>{{Cite book|url=https://books.google.com/books?id=ERoAm13YF8IC&printsec=frontcover&dq=Potter,+Norman+N.+Food+Science&hl=en&sa=X&ved=0ahUKEwjr16nBlvrQAhVGVyYKHSKKCY8Q6AEIGjAA#v=onepage&q=Potter,%20Norman%20N.%20Food%20Science&f=false|title=Food Science|last=Potter|first=Norman N.|last2=Hotchkiss|first2=Joseph H.|date=1998-01-01|publisher=Springer Science & Business Media|isbn=9780834212657|language=en}}</ref> Energy is needed for the process because the state of unprotected oil droplets in water is thermodynamically unfavorable (ΔG of the process is positive).
The ''[[Webster's Dictionary]]'' of 1913 defined ''‘catchup’'' as: ''“table sauce made from mushrooms, tomatoes, walnuts, etc. [Also written as ketchup].”''


When hydrocarbon molecules (oil) are forced into water layer, hydrogen bond of water molecules and some dispersion forces between hydrocarbon molecules must have been destroyed, and new water-hydrocarbon interaction must have been formed in this state. Considering Enthalpy change of the process, the input energy to reach this state and the released energy break even rendering enthalpy change of zero (ΔH<sub>solution</sub> =0) for the process. Enthalpy change equals zero also means that the thermal Entropy change ΔS<sub>thermal</sub> is also about zero for the process. However, positional Entropy change for the process (ΔS<sub>positional</sub>) is negative.<ref>{{Cite book|url=https://books.google.com/books?id=koo_AQAAIAAJ&q=Cobb,+Cathy+et+al.+Crime+Scene+Chemistry+For+The+Armchair+Sleuth&dq=Cobb,+Cathy+et+al.+Crime+Scene+Chemistry+For+The+Armchair+Sleuth&hl=en&sa=X&ved=0ahUKEwjyj7KjlfrQAhVLziYKHcijAJ4Q6AEIIDAB|title=Crime Scene Chemistry for the Armchair Sleuth|last=Cobb|first=Cathy|last2=Fetterolf|first2=Monty L.|last3=Goldsmith|first3=Jack G.|date=2007-01-01|publisher=Prometheus Books|isbn=9781591025054|language=en}}</ref> This is because when oil droplets are in water medium, those water molecules that are in contact with the hydrocarbon molecules lose their freedom of movement. If oil droplets are not in water phase, more water molecules would be more freely to move instead of having restriction on their arrangements. Thus, it is a thermodynamically favorable process for the pure, unprotected oil droplets to move out of water medium as the process is driven forward by Entropy.
Modern ketchup emerged in the early years of the 20th century, out of a debate over the use of [[sodium benzoate]] as a preservative in condiments. [[Harvey W. Wiley]], the "father" of the [[Food and Drug Administration]] in the US, challenged the safety of benzoate which was banned in the 1906 [[Pure Food and Drug Act]]. In response, entrepreneurs including [[Henry J. Heinz]], pursued an alternative recipe that eliminated the need for that preservative.<ref name="madehow"/>


Phase separation of oil and water is not only Entropy-driven, but is also driven forward to undo the increase in contact area between oil and water. Forming extra interfacial layer, as when oil droplets are in the water layer, increase the overall energy of the oil-water system.<ref>{{Cite book|url=https://books.google.com/books?id=JOf66-7G3VwC&printsec=frontcover&dq=Pharmaceutical+Suspensions.&hl=en&sa=X&ved=0ahUKEwiB5-HelfrQAhVFSCYKHTGNDXIQ6AEIHDAA#v=onepage&q=Pharmaceutical%20Suspensions.&f=false|title=Pharmaceutical Suspensions: From Formulation Development to Manufacturing|last=Kulshreshtha|first=Alok K.|last2=Singh|first2=Onkar N.|last3=Wall|first3=G. Michael|date=2009-11-05|publisher=Springer Science & Business Media|isbn=9781441910875|language=en}}</ref> This is because water and oil molecules at the interface are higher in energy compared to when they are in the middle and are surrounded on all directions by their own molecules. Thus, oil droplets would move out of water phase, after letting the mixture sit for a little, to get the change in interfacial area (ΔA) as small as possible in order to minimize the energy rise of the system (ΔG). The relationship between free energy change of a system and its interfacial area is expressed in the equation:
Prior to Heinz (and his fellow innovators), commercial tomato ketchups of that time were watery and thin, in part due to the use of unripe tomatoes, which were low in [[pectin]].<ref>Gladwell, Malcolm (2009). What the dog saw and other adventures. Little, Brown & Co., New York, p. 41.</ref> They had less vinegar than modern ketchups; by [[pickling]] ripe tomatoes, the need for benzoate was eliminated without spoilage or degradation in flavor. But the changes driven by the desire to eliminate benzoate also produced changes{{clarify|reason=What changes?|date=January 2013}} that some experts (such as Andrew F. Smith<ref>{{Cite book|author=Andrew F. Smith |title=The Tomato in America: Early History, Culture, and Cookery |publisher=University of Illinois Press |year=2001 |isbn=978-0-252-07009-9 |url=https://books.google.com/?id=e82QWB89_sIC&printsec=frontcover#PPP1,M1}}</ref>) believe were key to the establishment of tomato ketchup as the dominant American condiment.


''ΔG = γΔA''
===Later innovations===


where ΔG is the increase in surface free energy, ΔA is the increase in surface area, and γ is the interfacial tension between the two liquids.
In fast food outlets, ketchup is often dispensed in small packets. Diners tear the side or top and squeeze the ketchup out of the [[Condiment sachet|ketchup packets]]. In 2011, Heinz began offering a new measured-portion package, called the "Dip and Squeeze" packet, which allowed the consumer to either tear the top off the package and squeeze the contents out, as with the traditional packet, or, in the alternative, tear the ''front'' off the package and use the package as a dip cup of the type often supplied with certain entreés.<ref name="Nassauer">{{cite web|url=http://online.wsj.com/article/SB10001424053111904194604576578691502178606.html|title=Old Ketchup Packet Heads for Trash|last=Nassauer|first=Sarah|date=September 19, 2011|work=The Wall Street Journal|publisher=Dow Jones & Company, Inc.|accessdate=19 October 2012}}</ref>


Emulsifying agent (lecithin) used in mayonnaise are able to suspend oil droplets in water because it lowers the interfacial tension γ between oil and water. When emulsifying agent, lecithin, is added to the oil and water emulsion, they are adsorbed onto the interfacial layer in a manner that their hydrophobic tail point toward the non-polar oil droplet, and their hydrophilic end facing the polar water molecules.<ref>{{Cite book|url=https://books.google.com/books?id=e93wQwAACAAJ&dq=Block,+Seymour+Stanton+and+Carl+A+Lawrence.+Disinfection,+Sterilization&hl=en&sa=X&ved=0ahUKEwjD942TlvrQAhWHWCYKHQThBLoQ6AEIHDAA|title=Disinfection, sterilization, and preservation|last=Lawrence|first=Carl A.|last2=Block|first2=Seymour Stanton|date=1968-01-01|publisher=Lea & Febiger|language=en}}</ref> In the presence of lecithin, the interfacial tension γ is lower as now water molecules is not in contact with hydrocarbon molecules at the interface anymore. Hence, a large increase of surface area (ΔA) is made possible because energy cost to arrive at the food state is now favorable.<ref>{{Cite book|url=https://books.google.com/books?id=B3MgvgAACAAJ&dq=Alexander,+Peter+and+Richard+Joseph+Block.+A+Laboratory&hl=en&sa=X&ved=0ahUKEwiSkbPtlfrQAhWIMyYKHSPvD6gQ6AEIJTAC|title=A Laboratory Manual of Analytical Methods of Protein Chemistry: Including Polypeptides|last=Alexander|first=Peter|last2=Block|first2=Richard Joseph|last3=Lundgren|first3=Harold Palmer|date=1960-01-01|publisher=Pergamon Press|language=en}}</ref>
Previously, fast food outlets dispensed ketchup from pumps into paper cups. This method has made a resurgence in the first decade of the 21st century with cost and environmental concerns over the increasing use of individual packets.


Mayonnaise emulsions eventually break as the oil droplets coalesce, although the kinetics and the precise mechanisms by which the droplets coalesce are not fully understood. As samples of mayonnaise age, the size distribution of the oil droplets changed to produce fewer, larger droplets which eventually led to separation of the phases of the mayonnaise. The shift in droplet size could be measured either microscopically (through light or scanning electron micrographs) or by a decrease in the absorbance at 500&nbsp;nm. When mayonnaise is stored at elevated temperatures, increases in Brownian motion of the droplets, decrease in the viscosity of the continuous phase, and solubilization of the surfactants all contribute to the breakdown of the emulsion.
In October 2000, Heinz introduced colored ketchup products called EZ Squirt, which eventually included green (2000), purple (2001), pink (2002), orange (2002), [[Teal (color)|teal]] (2002), and blue (2003).<ref>{{cite news|url=http://www.usatoday.com/money/industries/food/2003-04-07-blue-ketchup_x.htm |agency=Associated Press |title=Heinz unveils new blue ketchup |date=April 7, 2003 |work=USA Today}}</ref> These products were made by adding [[food coloring]] to the traditional ketchup. {{As of|2006|alt=As of January 2006}} these products were discontinued.<ref>[http://www.heinz.com/Consumer_faq.aspx Heinz - Consumer FAQs] {{webarchive |url=https://web.archive.org/web/20081120231953/http://www.heinz.com/Consumer_faq.aspx |date=November 20, 2008 }}</ref>


Two unprotected oil droplets with small radii in water are favored thermodynamically to coalesce into one bigger droplet because the process yields a smaller surface area-to-volume ratio. The energetic contribution of the interfacial layer over that same volume of oil is minimized when the two droplets fuse together.<ref>{{Cite book|url=https://books.google.com/books?id=rC8wL3MeilwC&pg=PA234&dq=ratio+of+area+volume+surface+tension&hl=en&sa=X&ved=0ahUKEwjf4Jbkt_rQAhVE9WMKHQWNCqMQ6AEINzAD#v=onepage&q=ratio%20of%20area%20volume%20surface%20tension&f=false|title=Practical Formation Evaluation|last=Ransom|first=Robert C.|date=1995-12-29|publisher=John Wiley & Sons|isbn=9780471107552|language=en}}</ref> Thus, the coalescence process puts the system in a lower energy state and the process would occur spontaneously. However, when the oil droplets are coated with emulsifying agent, electrostatic repulsive force is introduced among the oil droplets which keeps the droplets from coming together.
==Terminology==
The term used for the sauce varies. ''Ketchup'' is the dominant term in American English, [[Canadian English]], and [[British English]], although ''catsup'' is commonly used in some southern US states and Mexico.<ref>{{cite web|title=Catsup vs Ketchup|url=http://www.diffen.com/difference/Catsup_vs_Ketchup|date=July 2014}}</ref> In these dialects, ''[[tomato sauce]]'' refers to pasta sauce, and is not a synonym for ketchup. ''Tomato sauce'' is more common in some other English-speaking countries (Australia, India, and New Zealand) or used almost exclusively (South Africa). ''Red sauce'' is used in [[Welsh English]], [[Scottish English]] and some parts of England, such as the [[Black Country]], and in [[South London]], often contrasting with [[brown sauce]] with which it is often served—but in Canadian and American English, "red sauce" refers to various tomato-based sauces commonly paired with pasta dishes, and is not a synonym for ketchup.


Manufacturers usually try to reduce the oil content of mayonnaise as much as possible within the limits of the food regulations of the country the mayonnaise will be sold in. This is because the oil is usually the most expensive component of mayonnaise. Unfortunately, reducing the proportion of oil in mayonnaise reduces the density of the oil droplets. This means that the interactions between droplets are weakened and the emulsion becomes less stable. In the absence of strong inter-droplet interactions, low-fat emulsions separate under gravity in accordance with the Stokes equation:
The etymology of the word ''ketchup'' is unclear, with multiple competing theories.<ref name="pureketchup">"The etymological origin of the word ''ketchup'' is a matter of confusion." ''Pure Ketchup'', by Andrew F. Smith, ISBN 1-56098-993-9. Page 4.</ref>


<math>v=2gr^2( \rho_1-\rho_2)/9\eta_1</math>
===China theory===
One prominent theory is that the word came to English from the Cantonese "keh jup" (茄汁 ''ke2 zap1'', a shorterned version of 蕃茄汁 ''faan1 ke2 zap1'' "tomato sauce; tomato juice").<ref>South China Morning Post [http://www.scmp.com/magazines/post-magazine/article/1622895/chinese-britain-charting-diasporas-journey-new-land article]</ref>


where v is the creaming velocity, g is the acceleration due to gravity, r is the radius of the droplets, and &rho; and &eta; are the density and shear viscosity, respectively, of a given phase. The subscripts 1 and 2 refer to the continuous and dispersed phases, respectively. Stability of a medium-to-low-fat emulsion can be increased by reducing the size of the droplets, which also produces a product with a lighter, "creamier" appearance. Another possibility is to increase the viscosity of the continuous phase, and various products including proteins, dextrins and gums are available for this purpose.<ref>{{Cite journal|last=Depree|first=J. A|last2=Savage|first2=G. P|date=2001-05-01|title=Physical and flavour stability of mayonnaise|url=http://www.sciencedirect.com/science/article/pii/S0924224401000796|journal=Trends in Food Science & Technology|volume=12|issue=5–6|pages=157–163|doi=10.1016/S0924-2244(01)00079-6}}</ref>
An alternative theory is that the word derives from one of two words from the [[Fujian]] region of coastal southern China: "kôe-chiap" (in [[Xiamen]] (Amoy)) or "kê-chiap"<ref name="ahd">"[http://www.answers.com/topic/ketchup Ketchup]". The American Heritage Dictionary of the English Language, 4th edition, published by Houghton Mifflin Company</ref> (in [[Guangzhou]] (Canton)). Both of these words (鮭汁, kôe-chiap and kê-chiap) come from the [[Amoy dialect]] of China, where it meant the [[brine]] of pickled fish (鮭, salmon; 汁, juice) or shellfish.<ref name=OED>In the Chinese Amoy dialect, "kôe-chiap" ([[Xiamen]] accented Amoy) or "kê-chiap" (probably [[Penang Hokkien]], which is based on [[Zhangzhou]] accented Amoy) (part of the Ming Na language) signifies "brine of pickled fish or [[shell-fish]]" (The Oxford English Dictionary, Douglas Chinese Dict. 46/1, 242/1).</ref> There are citations of "koe-chiap" in the ''Dictionary of the Vernacular or Spoken Language of the [[Amoy]]'' (London; Trudner) from 1873, defined as "brine of pickled fish or shell-fish."


=== Viscoelastic Properties===
===Malay theory===
As a semi-solid, mayonnaise has an extremely high [[viscosity]] and because of this, its flow properties have been studied extensively. [[Shear stress]] is an important term when discussing liquids and solids at any viscosity and is defined as the force per unit area that is required to drag one layer of substance past another layer. [[Rheology]] is the study of science that deals with the flow and deformation of matter and is an umbrella for a few of mayonnaise's properties. One of which includes [[Yield (engineering)|yield stress]] which can be defined as a minimum shear stress required to initiate flow. So, with all of these terms now defined, one can look at the specific properties that mayonnaise possesses. Mayonnaise has a high shear stress with a typical yield stress around 100 [[Pascal (unit)|Pascals]]). For reference, [[ketchup]] has a yield stress of about 15 Pascals. With such a high yield stress, mayonnaise is able to resist low forces and even return to its original conformation.<ref>{{cite web|last1=Troyer|first1=Drew|title=Understanding Absolute and Kinematic Viscosity|url=http://www.machinerylubrication.com/Read/294/absolute-kinematic-viscosity|website=Machinery Lubrication|accessdate=20 December 2016}}</ref> A simple equation can be written to explain the relationship between these terms:
Ketchup may have<ref name="Merriam-webster.com"/> entered the English language from the [[Malay language|Malay]] word ''kicap'' (pron. "kichap", also spelled ''kecap'', ''ketjap''). Originally meaning "fish sauce", the word itself derives the Chinese terms<ref>{{cite book|last=Yang|first=Kassim|title=Kamus Minerva|year=1994|location=Seremban}}</ref> above.


<math>\tau=\tau_0+k\gamma^n</math>
In [[Indonesian cuisine]], which is similar to [[Malay cuisine|Malay]], the term ''kecap'' refers to fermented savory sauces. Two main types are well known in their cuisine: ''kecap asin'' which translates to 'salty kecap' in [[Indonesian language|Indonesian]] (a salty soy sauce) and ''kecap manis'' or literally 'sweet kecap' in Indonesian. Kecap manis is a sweet soy sauce that is a mixture of soy sauce with brown sugar, molasses, garlic, ginger, anise, coriander and a bay leaf reduced over medium heat until rather syrupy. A third type, ''kecap ikan'', meaning "fish kecap" is [[fish sauce]] similar to the [[Thai cuisine|Thai]] ''[[nam pla]]'' or the [[Philippine cuisine|Philippine]] ''[[Patis (sauce)|patis]]''. It is not, however, soy-based.


In this equation, \tau is equal to the shear stress,\tau_0 is equal to the yield stress, \gamma is the shear rate and k & n are model parameters that influence the shape and curvature of the stress/rate curve. Mayonnaise happens to be a [[Bingham plastic|Bingham fluid]] where k is equal to the plasticity constant and n is equal to 1. This equation is in the form of y=mx+b and thus produces a [[line (geometry)|straight line]]. In more laymen's terms, the yield stress is the tipping point for conformational change in the mayonnaise after initial force is applied and it is held constant.
===European-Arabic theory===
American anthropologist E.N. Anderson relies on Elizabeth David to claim that ''ketchup'' is a [[cognate]] of the French ''escaveche'', meaning "food in sauce," but gives no further authority.<ref>Eugene N. Anderson. ''The Food of China.'' (New Haven: Yale University Press, 1988; ISBN 0300047398), p. 160.</ref> The word also exists in Spanish and Portuguese forms as ''[[escabeche]]'', "a sauce for pickling", which culinary historian Karen Hess traced back to Arabic ''Kabees'', or "pickling with vinegar". The term was anglicized to ''caveach'', a word first attested in the late 17th century, at the same time as ''ketchup''.<ref name="pureketchup"/>


===Early uses in English===
=== Freezing Mayonnaise===
Mayonnaise is an oil in water emulsion which is stable at room temperature because it reaches [[Phase (matter)|phase equilibrium]]. At freezing temperatures, the structures inside of mayonnaise undergo [[crystallization]] which is bad news depending on the type of [[emulsion]]. Butter is a water in oil emulsion with the water phase having a higher [[melting point|freezing point]] than oil. In the freezer, the small water droplets that are suspended in the continuous oil phase freeze in their specific locations while the rest of the oil stays in place. When the butter is needed, one only needs to take it out of the freezer and thaw it for the general properties of butter return as the water droplets melt in their respective locations. Mayonnaise is different; when oil in water emulsions are frozen, the continuous phase is water which freezes and allows the oil droplets to [[flocculation|flocculate]]. This whole process causes a phase separation between the water and the oil.
The word entered the [[English language]] in Britain during the late 17th century, appearing in print as ''catchup'' (1690) and later as ''ketchup'' (1711). The following is a list of early quotations collected by the ''[[Oxford English Dictionary]]''.
Once ice crystals start to form in the continuous water phase, they begin to inhibit the [[lecithin]] and [[phospholipid]]s from working. These two emulsifying agents lose their functionality due to [[dehydration]]: water is crystallizing with itself and is leaving these agents "out to dry." The oil droplets begin to flocculate without the emulsifying agents keeping them separated.<ref>{{cite web|last1=Lowe|first1=Belle|title=Breaking Mayonnaise|url=http://chestofbooks.com/food/science/Experimental-Cookery/Breaking-Mayonnaise.html|website=Chest of Books|accessdate=20 December 2016}}</ref> At water's freezing point, this is enough to destabilize the mayonnaise emulsion but at even lower temperatures, the fused oil droplets reach their freezing points and fat crystal nucleation begins. Mayonnaise therefore, should not be stored at frozen temperatures due to their thermodynamic instability. Freezing of the water phase in mayonnaise is catastrophic to the stability and shelf-life of the entire product.
[[File:Blue Label Ketchup, 1898.jpg|thumb|right|Blue Label Tomato Ketchup advertisement, Curtice Brothers 1898.]]
* 1690, B. E., ''[[A New Dictionary of the Terms Ancient and Modern of the Canting Crew]]''
** Catchup: a high East-India Sauce.
* 1711, Charles Lockyer, ''An Account of the Trade in India'' 128
** Soy comes in Tubbs from Japan, and the best Ketchup from Tonquin; yet good of both sorts are made and sold very cheap in China.
* 1727, [[Eliza Smith]], ''[[The Compleat Housewife, or, Accomplish'd Gentlewoman's Companion]]''<ref name=JASNA>{{cite journal |last1=Mitchell |first1=Christine M. |title=Book Review: The Handy Homemaker, Eighteenth-Century Style |url=http://www.jasna.org/bookrev/br261p22.pdf |journal=JASNA News |issue=Spring 2010 |accessdate=26 March 2015}}</ref>
:: The first published recipe: it included mushrooms, anchovies and horseradish.
* 1730, [[Jonathan Swift]], ''A Panegyrick on the Dean'' Wks. 1755 IV. I. 142
** And, for our home-bred British cheer, Botargo, catsup, and caveer.
* 1748, Sarah Harrison, ''The Housekeeper's Pocket-Book and Compleat Family Cook''. i. (ed. 4) 2,
** I therefore advise you to lay in a Store of Spices, ... neither ought you to be without ... Kitchup, or Mushroom Juice.
* 1751, Mrs. Hannah Glasse, ''Cookery Bk''. 309
** It will taste like foreign Catchup.
* 1817, [[George Gordon Byron]], ''Beppo'' viii,
** Buy in gross ... Ketchup, Soy, Chili~vinegar, and Harvey.
* 1832, ''Vegetable Substances Used for the Food of Man'' 333
** One ... application of mushrooms is ... converting them into the sauce called Catsup.
* 1840, [[Charles Dickens]], ''[[Barnaby Rudge]]'' (1849) 91/1
** Some lamb chops (breaded, with plenty of ketchup).
* 1845, [[Eliza Acton]], ''Modern Cookery'' v. (1850) 136 (L.)
** Walnut catsup.
* 1862, ''Macmillan's Magazine''. Oct. 466
** He found in mothery catsup a number of yellowish globular bodies.
* 1874, Mordecai C. Cooke, ''Fungi; Their Nature, Influence and Uses'' 89
** One important use to which several ... fungi can be applied, is the manufacture of ketchup.


==Preparation==
The spelling ''catsup'' seems to have appeared first from the pen of [[Jonathan Swift]], in 1730. Despite this origin, the spelling is largely unused in Britain today, where it is often assumed to be an [[American English|Americanism]].
[[File:Mayones.jpg|thumb|upright|Making mayonnaise with a [[whisk]]]]
Mayonnaise can be made by hand with a [[mortar and pestle]],<ref>{{cite web|url = http://goodfood.uktv.co.uk/recipe/perfect-mayonnaise/|title = perfect mayonnaise recipe: Recipes: Good Food Channel|last = Randall|first = Theo|accessdate = 26 December 2012}}</ref> [[whisk]], or [[fork]], or with the aid of an electric [[Mixer (cooking)|mixer]] or [[blender]]. It is made by slowly adding oil to an egg yolk, while whisking vigorously to disperse the oil. The oil and the water in yolks form a base of the emulsion, while [[lecithin]] and protein from the yolks are the [[emulsifiers]] that stabilize it.<ref>{{cite book|last1=Segil|first1=Wallace|last2=Zou|first2=Hong|title=Eggs: Nutrition, Consumption, and Health|date=2012|publisher=Nova Science Publishers|location=New York|isbn=9781621001256}}</ref>{{Page needed|date=May 2015}} A combination of van der Waals interactions and electrostatic repulsion determine the bond strength among oil droplets. The high viscosity of mayonnaise is attributed to the total strength created by these two intermolecular forces.<ref>{{Cite journal|last=Depree|first=J. A|last2=Savage|first2=G. P|date=2001-05-01|title=Physical and flavor stability of mayonnaise|url=https://www.researchgate.net/publication/248485299_Physical_and_flavor_stability_of_mayonnaise|volume=12|issue=5|doi=10.1016/S0924-2244(01)00079-6|issn=0924-2244}}</ref> Taste and further stabilize the emulsion, as mustard contains small amounts of lecithin.<ref>{{cite web |url=http://www.goodeatsfanpage.com/Season4/EA1D10.htm |title=Good Eats Season 4 Episode 10 - EA1D10:The Mayo Clinic |publisher=Good Eats Fan Page |accessdate=8 January 2012}}</ref> If vinegar is added directly to the yolk, it can emulsify more oil, thus making more mayonnaise.<ref>{{cite book|last1=This|first1=Hervé|last2=Gladding|first2=Jody|title=Kitchen Mysteries: Revealing the Science of Cooking|date=2010|publisher=Columbia University Press|location=New York|isbn=0-231-14171-8|page=39|edition=Pbk.|url=https://books.google.com/books?id=QB14rlPgSFUC&pg=PT51&redir_esc=y#v=onepage&q&f=false|accessdate=31 May 2012}}</ref>


For large-scale preparation of mayonnaise where mixing equipment is being employed, the process typically begins with the dispersal of eggs, either powdered or liquid, into water. Once emulsified, the remaining ingredients are then added and vigorously mixed until completely hydrated and evenly dispersed. Oil is then added as rapidly as it can be absorbed. Though only a small part of the total, ingredients other than the oil are critical to proper formulation. These must be totally hydrated and dispersed within a small liquid volume, which can cause difficulties including emulsion breakdown during the oil-adding phase. Often, a long agitation process is required to achieve proper dispersal/emulsification, presenting one of the trickiest phases of the production process.<ref>{{cite web|url=http://www.silverson.com/us/sauces-and-dressings-application-reports.html|title=Food Industry Application Reports - Sauces & Dressings|publisher=Silverson Mixers |accessdate=3 October 2013}}</ref> Though, as technology in the food industry advances, processing has been shortened drastically, allowing roughly 1000 liters to be produced in 10 minutes.<ref>{{cite web|url=http://www.ikaprocess.com/owa/ika/content.news_detail?iNews=147&iDiv=3 |title=IKA - 1000 liters Mayonnaise in only 10 minutes! |publisher=Ikaprocess.com |date= |accessdate=14 February 2015}}</ref>
==="Fancy" ketchup===
Some ketchup in the U.S. is labeled "Fancy". This is a [[United States Department of Agriculture|USDA]] grade, relating to [[specific gravity]]. Fancy ketchup has a higher tomato solid concentration than other USDA grades.<ref>{{cite web
| url = http://ucanr.org/sites/Zann_test/files/28715.pdf
| title = Textural Modification of Processing Tomatoes
| accessdate = 2011-05-19
}}</ref>
{| class="wikitable"
|+ USDA Ketchup Grades
! Grade
! Specific Gravity
! Total Solids
|-
| Fancy
| 1.15
| 33%
|-
| Extra Standard
| 1.13
| 29%
|-
| Standard
| 1.11
| 25%
|}


== Composition ==
== Microbial Spoilage ==
Microbial spoilage is a big category in spoilage of mayonnaise. Both commercially processed mayonnaise and home-made mayonnaise has been associated with illnesses from Salmonella globally. The source of Salmonella is confirmed to be from the raw eggs ingredient.<ref>{{Cite book|url=https://books.google.com/books?id=q2Rfq1ZIWTMC&printsec=frontcover&dq=Microbiologically+Safe+Foods&hl=en&sa=X&ved=0ahUKEwjv3cz52YjRAhXG7YMKHasXDZcQ6AEIGjAA#v=onepage&q=Microbiologically%20Safe%20Foods&f=false|title=Microbiologically Safe Foods|last=Garcia|first=Jose Santos|date=2009-04-01|publisher=John Wiley & Sons|isbn=9780470439067|language=en}}</ref> Several outbreaks with fatal cases have been recorded with a few major incidents. In 1955, there was an outbreak in Denmark with 10,000 people affected with Salmonella from contaminated mayonnaise made from large kitchen. The pH of mayonnaise was found to be 5.1 with Salmonella count of 180,000 per gram. The second outbreak also in Denmark has 41 infected cases in total with 2 fatalities. The pH of the contaminated mayonnaise was 6.0 with 6 million counts per gram. In 1976, there was serious salmonellosis outbreaks on four flights to and from Spain which caused 500 ill cases and 6 fatalities. In the US, 404 people became ill and 9 people died in a New York City hospital due to hospital-prepared mayonnaise.<ref>{{Cite book|url=https://books.google.com/books?id=BoR8vgAACAAJ&dq=The+Microbiological+Safety+and+Quality+of+Food&hl=en&sa=X&ved=0ahUKEwiQrc2S2ojRAhUpyoMKHdvJAYoQ6AEIKjAA|title=Microbiological Safety and Quality of Food|last=Lund|first=Barbara|last2=Baird-Parker|first2=Anthony C.|last3=Gould|first3=Grahame W.|date=1999-12-31|publisher=Springer US|isbn=9780834213234|language=en}}</ref> In all Salmonellosis cases, the major reason was due to the improper acidification of the mayonnaise in which the pH level was higher than the recommended value of 4.1 or lower, with acetic acid as the main acidifying agent.<ref>{{Cite book|url=https://books.google.com/books?id=sslUPhiE5C8C&pg=PA618&dq=Food+Safety+1995&hl=en&sa=X&ved=0ahUKEwjD1-Ov2ojRAhXp7oMKHbDxCQ4Q6AEIJTAA#v=onepage&q=Food%20Safety%201995&f=false|title=Food Safety 1995|last=Steinhart|first=Carol E.|last2=Doyle|first2=M. Ellin|last3=Institute|first3=Food Research|last4=Cochrane|first4=Barbara A.|date=1995-06-06|publisher=CRC Press|isbn=9780824796242|language=en}}</ref>
Heinz tomato ketchup’s ingredients are: tomato concentrate from red ripe tomatoes, distilled [[vinegar]], [[high fructose corn syrup]], [[corn syrup]], [[salt]], spice, onion powder, and natural flavoring.<ref>{{Cite web|url=http://www.heinzketchup.com|title=Ketchup – Tomato Ketchup {{!}} Heinz Ketchup|website=www.heinzketchup.com|access-date=2016-12-15}}</ref> Tomato concentrate from red ripe tomatoes is the first ingredient on the list, which means it has the highest percentage of weight within the final product. Tomatoes have a complex composition of sugars, starch, [[pectin]], ascorbic acids, organic acids, amino acids, steroids, carotenoids, lipids, free fatty acids, and volatiles.<ref>Salunkhe, D.K., Jadhav, S.J., Yu M. H. Quality and Nutritional Composition of Tomato Fruit as Influenced by Certain Biochemical and Physiological Changes. Logan, Edmonton, & Washington. 1974.</ref> The second ingredient listed is distilled vinegar, which is eighty percent pure water and twenty percent acetic acid.<ref name=":03">Vilgis, T. 1893. Nineteen: Ketchup as Tasty Soft Matter. The Kitchen as Laboratory: Reflections on the Science of Food and Cooking. New York: Columbia University Press. 142-145</ref> Next is high fructose corn syrup, which is made up of 42% [[fructose]], 53% [[glucose]], and 5% other polysaccharides and sugars.<ref name=":1">White, J. S., Straight talk about high-fructose corn syrup: what it is and what it ain’t. The American Journal of Clinical Nutrition. 2008.</ref> Corn syrup is 100% glucose.<ref name=":1" /> Salt is the next ingredient listed and is composed of sodium and chloride ions. Spice, onion powder, and natural flavoring are the last ingredients on the list, meaning that they have the least percent weight. These three ingredients contribute to overall flavor of the product.


Nutrient content of mayonnaise (>50% edible oil, 9-11% salt, 7-10% sugar in the aqueous phase) is suitable as food source for many spoilage organisms, the set of condition such as (low pH of 3.6 to 4.0, low water activity a<sub>w</sub> of 0.925) restricts the growth of yeasts, a few bacteria and molds.<ref>{{Cite book|url=https://books.google.com/books?id=qv_jBwAAQBAJ&pg=PR18&dq=Modern+Food+Microbiology&hl=en&sa=X&ved=0ahUKEwi8z6zD2ojRAhWly4MKHXRHCikQ6AEIHDAA#v=onepage&q=Modern%20Food%20Microbiology&f=false|title=Modern Food Microbiology|last=Jay|first=James M.|date=2012-12-06|publisher=Springer Science & Business Media|isbn=9781461574767|language=en}}</ref> Yeasts of the genus Saccharomyces (Lactobacillus fructivorans and Z. bailii) are the species that responsible for the spoilage mayonnaise. The characteristics of spoilage caused by Z.bailli are product separation and a “yeasty” odor. A study suggests that adding encapsulated cells of Bifidobacterium bifidum and B. infantis prolongs the life of mayonnaise up to 12 weeks without microorganism spoilage.
==Nutrition==
The following table compares the nutritional value of ketchup with raw ripe tomatoes and [[salsa (sauce)|salsa]], based on information from the [[United States Department of Agriculture|USDA]] Food Nutrient Database.<ref>{{cite web|url= http://www.ars.usda.gov/Services/docs.htm?docid=8964 |title= National Nutrient Database for Standard Reference |publisher= [[USDA]] |accessdate= 2007-12-03}}</ref>
{| class="wikitable"
|-
! Nutrient<br>(per 100 g)
! Ketchup
! Low [[sodium]]<br />Ketchup
! Tomatoes,<br />year-round
! USDA commodity<br />salsa
|-
| [[food energy|Energy]]
| 100 [[calorie|kcal]]<br />419 kJ
| 104 kcal<br />435 kJ
| 18 kcal<br />75 kJ
| 36 kcal<br />150 kJ
|-
| [[water (molecule)|Water]]
| 68.33 [[gram|g]]
| 66.58 g
| 94.50 g
| 89.70 g
|-
| [[Protein]]
| 1.74 g
| 1.52 g
| 0.88 g
| 1.50 g
|-
| [[Fat]]s
| 0.49 g
| 0.36 g
| 0.20 g
| 0.20 g
|-
| [[Carbohydrates]]
| 25.78 g
| 27.28 g
| 3.92 g
| 7.00 g
|-
| [[Sodium]]
| 1110 [[milligram|mg]]
| 20&nbsp;mg
| 5&nbsp;mg
| 430&nbsp;mg
|-
| [[Vitamin C]]
| 15.1&nbsp;mg
| 15.1&nbsp;mg
| 12.7&nbsp;mg
| 4&nbsp;mg
|-
| [[Lycopene]]
| 17.0&nbsp;mg
| 19.0&nbsp;mg
| 2.6&nbsp;mg
| n/a
|}
Ketchup has moderate health benefits.<ref>{{cite web | url= http://www.bbc.co.uk/dna/h2g2/A2821781 | title=Ketchup | work=BBC | date= July 27, 2004 | accessdate=May 25, 2011}}</ref> Ketchup is a source of [[lycopene]], an antioxidant which may help prevent some forms of cancer. This is particularly true of the organic brands of ketchup, which have three times as much lycopene.<ref>{{Cite journal| last1 = Ishida | first1 = B | last2 = Chapman | first2 = M | title = A comparison of carotenoid content and total antioxidant activity in catsup from several commercial sources in the United States | journal = J Agric Food Chem | volume = 52 | issue = 26 | pages = 8017–20 | year = 2004 | pmid = 15612790 | doi = 10.1021/jf040154o}}</ref> Ketchup, much like [[marinara sauce]] and other cooked tomato foods, yields higher levels of lycopene per serving because cooking increases lycopene [[bioavailability]].{{citation needed|date=July 2016}}


==Viscosity==
==Uses==
[[File:Zaanse mayonaise.jpg|thumb|Mayonnaise from the [[Zaan|Zaan district]], [[North-Holland]], Netherlands and [[French fries]]]]
[[File:2008-11-12 Russell pouring ketchup at Elmo's Diner.jpg|thumb|150px|Transferring ketchup between plastic bottles.]]
Commercial tomato ketchup has an additive, usually [[xanthan gum]], which gives the condiment a [[pseudoplastic]] or "shear thinning" property - more commonly known as [[thixotropic]]. This increases the viscosity of the ketchup considerably with a relatively small amount added—usually 0.5%—which can make it difficult to pour from a container. However, the shear thinning property of the gum ensures that when a force is applied to the ketchup it will lower the viscosity enabling the sauce to flow. A common method to getting ketchup out of the bottle involves inverting the bottle and shaking it or hitting the bottom with the heel of the hand, which causes the ketchup to flow rapidly. A technique involves inverting the bottle and forcefully tapping its upper neck with two fingers (index and middle finger together). Specifically, with a [[Heinz Tomato Ketchup|Heinz ketchup]] glass bottle, one taps the 57 circle on the neck. This helps the ketchup flow by applying the correct shearing force.<ref name="HowToPourKetchup">{{cite web
| url = http://www.heinzketchup.com/FAQ.aspx/
| archiveurl = https://web.archive.org/web/20121105102624/http://www.heinzketchup.com/FAQ.aspx/
| archivedate = 2012-11-05
| title = What's the best way to get Heinz® Ketchup out of the iconic glass bottle?
| accessdate = 2012-11-05}}</ref> These techniques work because of how pseudoplastic fluids behave: their [[viscosity]] (resistance to flow) decreases with increasing shear rate. The faster the ketchup is sheared (by shaking or tapping the bottle), the more fluid it becomes. After the shear is removed the ketchup thickens to its original viscosity.


===Chile===
Ketchup is a Non-Newtonian fluid meaning that its [[viscosity]] changes under stress and is not constant. It is a shear thinning fluid which means its viscosity decreases with increased shear stress.<ref>{{Cite web|url=http://sciencelearn.org.nz/Science-Stories/Strange-Liquids/Non-Newtonian-fluids|title=Non-Newtonian fluids|website=Sciencelearn Hub|access-date=2016-10-12}}</ref> The equation used to designate a Non-[[Non-Newtonian fluid|Newtonian]] fluid is as follows: <math>\eta=\tau/\dot{y}</math> . This equation represents [[apparent viscosity]] where apparent viscosity is the [[shear stress]] divided by [[shear rate]]. Viscosity is dependent on stress. This is apparent when you shake a bottle of tomato sauce/ketchup so it becomes liquid enough to squirt out. Its viscosity decreased with stress.<ref>{{Cite web|url=https://science.nasa.gov/science-news/science-at-nasa/2002/07jun_elastic_fluids|title=Shear Mystery {{!}} Science Mission Directorate|website=science.nasa.gov|access-date=2016-10-12}}</ref>
Chile is the world's third major per capita consumer of mayonnaise and first in [[Latin America]].<ref name=":0">{{cite web|url=http://www.latinamerican-markets.com/chile---consumo-de-mayonesa |title=Chile - Consumo de mayonesa &#124; Latin American Markets |publisher=Web.archive.org |date=2005-11-26 |accessdate=2016-02-12 |deadurl=yes |archiveurl=https://web.archive.org/web/20051126165454/http://www.latinamerican-markets.com/chile---consumo-de-mayonesa |archivedate=26 November 2005 }}</ref> Mayonnaise became widely accessible in the 1980s.<ref name=":0" />
[[File:Dilatant-pseudoplastic.svg|thumb|Graph representation of the three main fluid viscosity categories]]
The molecular composition of ketchup is what creates ketchup's [[Shear thinning|pseudoplastic]] characteristics. Small polysaccharides, sugars, acids, and water make up the majority of the metastable ketchup product, and these small structures are able to move more easily throughout a matrix because of their low mass. While exposed to shear stress, the molecules within the suspension are able to respond quickly and create an alignment within the product.<ref name=":0">{{Cite book|title=An Introduction to the Physical Chemistry of Food|last=Coupland|first=J|publisher=Springer|year=2014|isbn=|location=|pages=128|quote=|via=}}</ref> The bonds between the molecules are mostly hydrogen bonds, ionic interactions, and electrostatic interactions, all of which can be broken when subject to stress. [[Hydrogen bond]]s are constantly rearranging within a product due to their need to be in the lowest energy state, which further confirms that the bonds between the molecules will be easily disrupted. This alignment only lasts for as long as shear stress is applied. The molecules return to their original disorganized state once the shear stress dissipates.<ref name=":0" />


== Separation ==
===Europe===
Guidelines issued in September 1991 by Europe's Federation of the Condiment Sauce Industries recommend that oil and liquid egg yolk levels in mayonnaise should be at least 70% and 5%, respectively. The Netherlands incorporated this guideline in 1998 into the law ''Warenwetbesluit Gereserveerde aanduidingen'' in article 4.<ref>{{cite web|url=http://wetten.overheid.nl/BWBR0009499/Artikel4/geldigheidsdatum_31-01-2014 |title=wetten.nl - Wet- en regelgeving - Warenwetbesluit Gereserveerde aanduidingen - BWBR0009499 |publisher=wetten.nl|date=24 March 1998 |accessdate=30 January 2014}}</ref> Most available brands easily exceed this target.<ref>{{cite web|url=http://www.foodanddrinkeurope.com/news/ng.asp?id=51737-mayonnaise-sales-hit |title=Mayonnaise sales in Europe |publisher=Foodanddrinkeurope.com |date=29 April 2004 |accessdate=23 June 2009}}</ref>
Ketchup is one of the many products that is leachable; meaning that the water within the product migrates together as the larger molecules within the product sediment, ultimately causing water to separate out. This forms a layer of water on top of the ketchup due to the molecular instability within the product.<ref name=":03"/> This instability is caused by interactions between hydrophobic molecules and charged molecules within the ketchup suspension.


===North America===
[[Pectin]] is a polysaccharide within tomatoes that has the ability to bind to itself and to other molecules, especially water, around it. This enables it to create a gel-like matrix, dependent on the amount within the solution. Water is a large part of ketchup, due to it being 80% of the composition of distilled vinegar. In order for the water within the ketchup to be at the lowest possible energy state, all of the hydrogen bonds that are able to be made within the matrix must be made.<ref>Journel, A.G., Deutsch, C. V., Entropy and spatial disorder. Mathematical Geology. Volume 23, Is. 3. April 1993. 329-355.</ref> The water bound to the polysaccharide moves more slowly within the matrix, which is unfavorable with respect to [[entropy]].<ref name=":03" /> The increased order within the polysaccharide-water complex gives rise to a high-energy state, in which the water will want to be relieved. This concept implies that water will more favorably bind with itself because of the increased disorder between water molecules. This is partially the cause for water leaching out of solution when left undisturbed for a short period of time.
Commercial mayonnaise sold in jars originated in [[Philadelphia, Pennsylvania|Philadelphia]] in 1907 when Amelia Schlorer decided to start selling her own mayonnaise recipe originally used in salads sold in the family grocery store. [[Mrs. Schlorer's]] mayonnaise was an instant success with local customers and eventually grew into the Schlorer Delicatessen Company.<ref>{{cite web|url=https://news.google.com/newspapers?nid=1499&dat=19570829&id=aDEaAAAAIBAJ&sjid=-CUEAAAAIBAJ&pg=7076,5069512 |title=The Milwaukee Journal - Google News Archive Search |publisher=Google News |date= |accessdate=27 August 2015}}</ref> Around the same time in New York City, a family from [[Vetschau]], Germany, at [[Hellmann's and Best Foods|Richard Hellmann's]] delicatessen on Columbus Avenue, featured his wife's homemade recipe in salads sold in their delicatessen. The condiment quickly became so popular that Hellmann began selling it in "wooden boats" that were used for weighing butter. In 1912, Mrs. Hellmann's mayonnaise was mass-marketed and later was trademarked in 1926 as Hellmann's Blue Ribbon Mayonnaise.<ref>{{cite book|last1=Smith|first1=Andrew F.|title=The Oxford Companion to American Food and Drink|date=2007|publisher=Oxford University Press|location=New York|isbn=9780195307962|page=397|url=https://books.google.com/books?id=AoWlCmNDA3QC&pg=PT397&dq=&redir_esc=y#v=onepage&q&f=false|accessdate=14 February 2015}}</ref>


===Japan===
Other interactions that induce leaching are electrostatic and ionic interactions. Electrostatic interactions occur between charged molecules, which have repulsive or attractive forces between each other. The pectin within ketchup will have negative and neutral charges along the molecule due to the hydroxyl groups and relative pH, which is 3.9 on average.<ref>Porretta, S., Analytical Profiling of Ketchup. Journal of the Science of Food and Agriculture. Volume 57. 2006. 293-301.</ref> Pectin is most stable at a pH of 3.5, so the more basic pH within ketchup will protonate the hydroxyl side chains and therefore create a less viscous gel. [[Acetic acid]] within vinegar also has hydroxyl groups that will have a dispersed amount of negative and neutral charges along each molecule. The acetic acid and pectin will display repulsive interactions between the negatively charged oxygens on each molecule. The hydroxyls on each molecule will be able to form [[hydrogen bond]]s with the water in the product. The addition of salt will reduce the repulsive interactions between the negatively charged side chains of acetic acid and pectin within solution because they will create bonds with the dissociated sodium and chloride ions.<ref>Schwarz, U. Theory of soft biomatter. June 2009. 19-65</ref> The hydrogen bonds and electrostatic interactions will encourage leaching because the formation of bonds associated with the need for molecules to be in the lowest energy state are not always bonds that happen between different molecules and instead are formed between like molecules, causing aggregation.
[[File:2016 0529 Kewpie mayonnaise NL.jpg|thumb|Kewpie mayonnaise]]
Japanese mayonnaise is typically made with [[apple cider vinegar]] or [[rice vinegar]] and a small amount of [[monosodium glutamate|MSG]], which gives it a different flavor from mayonnaise made from [[vinegar|distilled vinegar]].<ref>{{cite book|last1=Hachisu|first1=Nancy Singleton|title=Japanese Farm Food|date=2012|publisher=Andrews McMeel Pub.|location=Kansas City, Mo.|isbn=1449418295}}</ref>{{Page needed|date=November 2015}}<ref>{{cite web|url=http://www.foodrepublic.com/2012/04/25/kewpie-mayo-wins-condiment-game|accessdate=30 June 2014|publisher=Food Republic|title=Kewpie mayo wins the condiment game}}</ref> It is most often sold in soft plastic squeeze bottles. Its texture is thicker than most Western commercial mayonnaise.<ref>{{cite web|url=http://pogogi.com/what-is-japanese-mayonnaise-and-how-is-it-different-from-american-mayo |title=What Is Japanese Mayonnaise and How Is It Different from American Mayo? &#124; POGOGI Japanese Food |publisher=Pogogi.com |date=31 July 2012 |accessdate=14 February 2015}}</ref>


Apart from salads, it is popular with dishes such as ''[[okonomiyaki]], [[takoyaki]]'' and ''[[yakisoba]]'' and may also accompany ''[[Tonkatsu|katsu]]'' and ''[[karaage]]''.<ref>{{cite web|author=Okonomiyaki World |url=http://okonomiyakiworld.com/Okonomiyaki-Ingredients.html |title=Ingredients - Okonomiyaki World - Recipes, Information, History & Ingredients for this unique Japanese Food |publisher=Okonomiyaki World |date=2015-11-04 |accessdate=2015-11-28}}</ref>
A way for ketchup manufacturing companies to avoid leaching of their products would be to add a hydrocolloid. [[Xanthan gum]] is able to stabilize ketchup by covalently binding to water. This strong bond keeps water from separating out of the ketchup and creating a layer at the surface.<ref name=":03" />


Kewpie (Q.P.) is the most popular brand of Japanese mayonnaise,<ref>{{cite web|last=Itoh |first=Makiko |url=http://www.japantimes.co.jp/life/2013/03/22/food/why-not-just-add-a-dollop-of-mayonnaise/#.V0x5E5F96VM |title=Why not just add a dollop of mayonnaise? |publisher=The Japan Times |date=2013-03-22 |accessdate=2016-07-01}}</ref> advertised with a [[Kewpie|Kewpie doll]] logo. The vinegar is a proprietary blend containing apple and malt vinegars.<ref>{{cite web|url=http://www.kewpie.co.jp/know/mayo/history/longrun.html#01 |title=おいしさロングラン製法|キユーピー |publisher=Kewpie.co.jp |date= |accessdate=17 November 2011}}{{self-published source|date=December 2012}}{{psc|date=December 2012}}</ref>
== See also ==

{{div col|colwidth=30em}}
===Russia===
* [[Banana ketchup]]
Mayonnaise is very popular in Russia, where it is made with [[sunflower]] seed oil. A 2004 study showed that Russia is the only market in Europe where mayonnaise is sold more than [[ketchup]] by volume. It is used as a sauce in the most popular salads in Russia, such as [[Olivier salad]] (also known as Russian salad), [[dressed herring]], and many others. Leading brands are Calve (marketed by Unilever) and Sloboda (marketed by Efko).<ref>{{cite web|url=http://www.foodnavigator.com/Financial-Industry/Moscow-s-particular-taste-in-sauces |title=Moscow's particular taste in sauces |publisher=FoodNavigator.com |date= |accessdate=27 March 2013}}</ref>
* [[Fruit ketchup]]

* [[Heinz Tomato Ketchup]]
===As a base for other sauces===
* [[Ketchup as a vegetable]]
Mayonnaise is the base for many other chilled sauces and [[salad dressing]]s. For example, ''[[Remoulade|sauce rémoulade]]'', in classic French cuisine, is mayonnaise to which has been added mustard, [[gherkin]]s, [[caper]]s, [[parsley]], [[chervil]], [[tarragon]], and possibly [[anchovy essence]].<ref>{{cite book|last1=Robuchon|first1=Joël|title=[[Larousse Gastronomique]]|date=2009|publisher=Hamlyn|location=London|isbn=9780600620426|page=1054|edition=Updated}}</ref>
* [[Dip (food)#List of common dips|List of dips]]

==Nutritional information==
A typical formulation for commercially made mayonnaise (not low fat) can contain as much as 80% vegetable oil, usually soybean but sometimes olive oil. Water makes up about 7% to 8% and egg yolks about 6%. Some formulas use whole eggs instead of just yolks. The remaining ingredients include vinegar (4%), salt (1%), and sugar (1%). Low-fat formulas will typically decrease oil content to just 50% and increase water content to about 35%. Egg content is reduced to 4% and vinegar to 3%. Sugar is increased to 1.5% and salt lowered to 0.7%. Gums or thickeners (4%) are added to increase viscosity, improve texture, and ensure a stable emulsion.<ref>{{cite web|url=http://edge.silverson.com/assets/PDFs/AppReports/Food/FMayonnaise.pdf|title=Mayonnaise Manufacture Case Study|publisher=Silverson |accessdate=3 October 2013}}</ref>

Mayonnaise is prepared using several methods, but on average it contains around {{convert|700|kcal}} per 100 grams, or 94 kilocalories (Cal) per tablespoon. This makes mayonnaise a calorically dense food.<ref>{{cite web|url=http://www.huffingtonpost.com/2014/02/26/mayo-substitutes-mayonnaise_n_4847998.html |title=10 Healthy Substitutes For Mayonnaise |publisher=Huffingtonpost.com |date=26 February 2014 |accessdate=27 August 2015}}</ref>

==Egg-free alternatives==
{{anchor|Mayonnaise alternatives}}
[[File:Vegan sandwich (3863098026).jpg|thumb|A vegan sandwich with egg-free mayonnaise]]
Egg-free versions of mayonnaise are available for [[Veganism|vegans]] and others who want to avoid eggs, animal fat, and [[cholesterol]], or who have [[Egg allergy|egg allergies]]. In the U.S., these alternatives cannot be labelled as "mayonnaise" because of the FDA's definition of mayonnaise making egg a requirement.<ref>{{cite web|url=http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm?fr=169.140 |title=CFR - Code of Federal Regulations Title 21 |publisher=Accessdata.fda.gov |date= |accessdate=2016-02-12}}</ref><ref name="fda-warning-letter"/>

Well-known brands include Nayonaise and Vegenaise in North America, and Plamil Egg Free in the UK.<ref name=eggfreemayo2>{{cite web|url=https://books.google.com/books?id=RSyom6UrjlUC&pg=PT168 |title=Main Street Vegan: Everything You Need to Know to Eat Healthfully and Live ... - Victoria Moran, Adair Moran - Google Books |publisher=Books.google.com |date=26 April 2012 |accessdate=27 August 2015}}</ref><ref>{{cite web|last=Goldstein |first=Katherine |url=http://www.slate.com/blogs/browbeat/2013/12/27/vegenaise_vs_mayonnaise_why_vegan_substitute_mayo_is_better_than_regular.html |title=Vegenaise vs. Mayonnaise: Why Vegan-substitute mayo is better than regular mayonanaise |publisher=Slate.com |date=27 December 2013 |accessdate=27 August 2015}}</ref><ref>{{cite web|url=http://www.plamilfoods.co.uk/egg-free-mayo/ |title=Plamil: Egg Free Mayonnaise |publisher=Plamilfoods.co.uk |date= |accessdate=27 August 2015}}</ref>

In August 2015,<ref name="fda-warning-letter">{{cite web|url=http://www.fda.gov/ICECI/EnforcementActions/WarningLetters/2015/ucm458824.htm |title=Hampton Creek Foods 8/12/15 |publisher=Fda.gov |date=20 August 2015 |accessdate=9 September 2015}}</ref> the United States [[Food and Drug Administration]] sent out a warning letter to the [[San Francisco]] company [[Hampton Creek]],<ref name=Mashable>{{cite web|author=Erica Swallow |url=http://mashable.com/2014/08/27/hampton-creek/ |title=Hampton Creek's Plan to Reimagine the Future of Food |publisher=Web.archive.org |date=2014-08-28 |accessdate=2016-03-22 |deadurl=yes |archiveurl=https://web.archive.org/web/20150907214720/http://mashable.com/2014/08/27/hampton-creek/ |archivedate=7 September 2015 }}</ref><ref name="Fast Company">{{cite web|author=Ariel Schwartz|url=http://www.fastcoexist.com/3017188/the-most-realistic-fake-eggs-in-existence-are-now-on-sale |title=The Most Realistic Fake Eggs In Existence Are Now On Sale &#124; Co.Exist &#124; ideas + impact |publisher=Fastcoexist.com |date=11 September 2013 |accessdate=9 September 2015}}</ref> objecting to the name of their "[[Just Mayo]]" product, which is not egg-based, so does not meet the U.S. legal definition of "mayonnaise".<ref name="fda-warning-letter"/><ref>{{cite web|url=https://www.gpo.gov/fdsys/pkg/CFR-2015-title21-vol2/xml/CFR-2015-title21-vol2-sec169-140.xml |title=Mayonnaise |publisher=Gpo.gov |date= |accessdate=2016-03-17}}</ref>

Egg-free mayonnaise is expected to contain soya or pea protein instead of lecithin in egg yolk as emulsifying agent to stabilize oil droplets in water.<ref>{{Cite book|url=https://books.google.com/books?id=O-t9BAAAQBAJ&pg=RA2-PA670&dq=egg-free+mayonnaise&hl=en&sa=X&ved=0ahUKEwiSzZfx24jRAhXK7IMKHfOsAhUQ6AEITDAG#v=onepage&q=egg-free%20mayonnaise&f=false|title=Encyclopedia of Food and Health|date=2015-08-26|publisher=Academic Press|isbn=9780123849533|language=en}}</ref>

==See also==
{{portal|Food}}
{{div col|colwidth=20em}}
* [[Baconnaise]]
* [[Egg (food)|Egg]] {{nb10}}
* [[Fritessaus]]
* [[Hellmann's and Best Foods]]
* [[Joppiesaus]]
* [[Just Mayo]]
* [[Dip (food)#List of common dips|List of common dips]]
* [[List of condiments]]
* [[List of condiments]]
* [[List of tomato dishes]]
* [[List of sauces]]
* [[Mustard (condiment)]]
* [[Miracle Whip]]
* [[Shelf stable food]]
* [[Salad cream]]
* [[Tomato jam]]
* [[Tomato paste]]
* [[Tomato purée]]
* [[Tomato sauce]]
* [[Curry ketchup]]
{{div col end}}
{{div col end}}


==References==
==References==
{{Reflist|30em}}
{{reflist|2|refs=
<ref name="Cooke">{{cite book | url=https://books.google.com/books?id=G3vQAAAAMAAJ&pg=PA201 | title=British Edible Fungi | author=Cooke, Mordecai Cubitt | year=1891 | pages=201–206}}</ref>
<ref name="Bell">{{cite news | url=http://www.independent.co.uk/life-style/condiments-to-the-chef-1098328.html | title=Condiments to the chef | publisher=''[[The Independent]]'' | date=June 5, 1999 | accessdate=10 September 2014 | author=Bell, Annie}}</ref>
<ref name="Branston">{{cite book | url=https://books.google.com/books?id=vtoNAAAAYAAJ&pg=PA148 | title=The hand-book of practical receipts of every-day use | publisher=Lindsay & Blakiston | author=Branston, Thomas F. | year=1857 | pages=148–149}}</ref>
}}


==External links==
==External links==
{{wiktionary}}
{{cookbook}}
{{Commons category}}
* {{Citation | first = Dan | last = Jurafsky | contribution-url = http://languageoffood.blogspot.com/2009/09/ketchup.html | contribution = Ketchup | publisher = Google blogger | url = http://languageoffood.blogspot.com/ | title = The Language of Food | accessdate = November 10, 2011}}.
*[http://tablascreek.typepad.com/tablas/2009/11/easy-homemade-mayonnaise-recipe.html Blender Mayonnaise Recipe]
* {{cite news |first=Dan |last= Weissmann |date=May 11, 2015 |title= Why Are Ketchup Packets So… Unsatisfying? |url= http://www.marketplace.org/topics/business/ive-always-wondered/why-are-ketchup-packets-so-unsatisfying |work= [[Marketplace (radio program)|Marketplace]] |publisher= [[American Public Media]] |agency=I've Always Wondered… (story series) |access-date= August 9, 2015}} On the origin of the 9 [[gram|g]] ketchup packet.
*[http://sc-smn.jst.go.jp/playprg/index/2048 Science Channel's ''The Making'' Series: #2 Making of Mayonnaise] (video in [[Japanese language|Japanese]])
*[http://www.npr.org/templates/story/story.php?storyId=5639903 NPR's Report on the 250th Birthday of Mayonnaise and its history]


{{Mayonnaise-based sauces}}
{{Condiments}}
{{Condiments}}
{{Use dmy dates|date=November 2015}}
{{Authority control}}

{{portal bar|Food}}


[[Category:Ketchup| ]]
[[Category:Chinese words and phrases]]
[[Category:Condiments]]
[[Category:Condiments]]
[[Category:Non-Newtonian fluids]]
[[Category:Sauces of the mayonnaise family]]
[[Category:Sauces]]
[[Category:French cuisine]]
[[Category:Spanish cuisine]]
[[Category:Mahón]]

Revision as of 16:34, 14 January 2017

Jar of pale-yellow mayonnaise

Mayonnaise (/ˈmənz/, /ˌməˈnz/ or in AmE also /ˈmænz/, and often abbreviated as mayo /ˈm/) is a thick, creamy dressing often used as a condiment.[1] It is a stable emulsion of oil, egg yolk, and either vinegar or lemon juice,[2] with many options for embellishment with other herbs and spices. Proteins and lecithin in the egg yolk serve as emulsifiers in both mayonnaise and hollandaise sauce.[3] Commercial egg-free alternatives are available for vegans and others who want to avoid animal products and cholesterol, or who are allergic to eggs.[4]

Lightmaw is cucked.

Mayonnaise varies in color, but is often white, cream, or pale yellow. It may range in texture from that of light cream to a thick gel. In countries influenced by French culture, mustard is also a common ingredient, but the addition of mustard turns the sauce into a remoulade with a different flavor and the mustard acts as an additional emulsifier.[5][6]

History

Standard ingredients and tools to make mayonnaise

The word mayonnaise was not used for a dressing before the start of the 19th century. The earliest reference appears to be by Alexandre Viard (1806), who however never quite gives a recipe for the dressing itself.[7] At that point, the sauce was made with aspic or jelly, rather than an egg emulsion. In 1815, Louis Eustache Ude wrote:

No 58.—Mayonnaise.
Take three spoonfuls of Allemande, six ditto of aspic, and two of oil. Add a little tarragon vinegar, that has not boiled, some pepper and salt, and minced ravigotte, or merely some parsley. Then put in the members of fowl, or fillets of soles, &c. Your mayonnaise must be put to ice; neither are you to put the members into your sauce till it begins to freeze. Next dish your meat or fish, mask with the sauce before it be quite frozen, and garnish your dish with whatever you think proper, as beet root, jelly, nasturtiums, &c.[8]

In a 1820 work, Viard describes something like the more familiar emulsified version:

This sauce is made to "take" in many ways: with raw egg yolks, with gelatine, with veal or veal brain glaze. The most common method is to take a raw egg yolk in a small terrine, with a little salt and lemon juice: take a wooden spoon, turn it while letting a trickle of oil fall and stirring constantly; as your sauce thickens, add a little vinegar; put in too a pound of good oil: serve your sauce with good salt: serve it white or green, adding green of ravigote or green of spinach.
This sauce is used for cold fish entrees, or salad of vegetables cooked in salt water.[9]

In 1808, Grimod de La Reynière referred to a "bayonnaise" sauce: "But if one wants to make from this cold chicken, a dish of distinction, one composes a bayonnaise, whose green jelly, of a good consistency, forms the most worthy ornament of poultry and fish salads."[10]

Anecdotal origins

One of the most common places named as the origin of mayonnaise is the town of Mahón in Menorca, Spain, where it was then taken to France after Armand de Vignerot du Plessis's victory over the British at the city's port in 1756. According to this version, the sauce was originally known as salsa mayonesa in Spanish and maonesa (later maionesa) in Catalan (as it is still known in Menorca), later becoming mayonnaise as it was popularized by the French.[11]

The Larousse Gastronomique suggests: "Mayonnaise, in our view, is a popular corruption of moyeunaise, derived from the very old French word moyeu, which means yolk of egg."[12] The sauce may have been christened mayennaise after Charles de Lorraine, duke of Mayenne, because he took the time to finish his meal of chicken with cold sauce before being defeated in the Battle of Arques.[13]

According to Trutter et al.: "It is highly probable that wherever olive oil existed, a simple preparation of oil and egg came about — particularly in the Mediterranean region, where aioli (oil and garlic) is made."[11]

According to the Oxford English Dictionary, the term mayonnaise was in use in English as early as 1823 in the journal of Lady Blessington.[14]

Physical and chemical properties

Traditional mayonnaise is a mixture of egg, vinegar, oil and spices (especially mustard). Mayonnaise made in this fashion typically contains 70–80% fat. Despite the high oil content relative to water, mayonnaise is an oil-in-water emulsion. This emulsion is formed by first mixing the eggs, vinegar and mustard and then slowly blending in the oil. This results in an emulsion consisting of a closely packed "foam" of oil droplets. By contrast, if the oil and aqueous phases are mixed all at once (as many novice cooks can attest) the result is a water-in-oil emulsion similar in viscosity to the oil from which it is made.

Oil may account for 75% or more of the total volume. This means that the oil droplets become distorted from their normal, spherical shape. The close packing of the droplets also allow them to interact very strongly with one another. It is a combination of these factors that gives traditional mayonnaise its high viscosity. The visco-elasticity of mayonnaise made with egg yolk reaches a maximum very quickly after preparation

For a mayonnaise food system in which emulsifying agent has not been added to the food system yet, the observation is that oil floats on top of water forming two separate layers. Energy as mechanical force (e.g. shear shaking) must be supplied into the system to force the oil to enter the water phase as oil droplets.[15] Energy is needed for the process because the state of unprotected oil droplets in water is thermodynamically unfavorable (ΔG of the process is positive).

When hydrocarbon molecules (oil) are forced into water layer, hydrogen bond of water molecules and some dispersion forces between hydrocarbon molecules must have been destroyed, and new water-hydrocarbon interaction must have been formed in this state. Considering Enthalpy change of the process, the input energy to reach this state and the released energy break even rendering enthalpy change of zero (ΔHsolution =0) for the process. Enthalpy change equals zero also means that the thermal Entropy change ΔSthermal is also about zero for the process. However, positional Entropy change for the process (ΔSpositional) is negative.[16] This is because when oil droplets are in water medium, those water molecules that are in contact with the hydrocarbon molecules lose their freedom of movement. If oil droplets are not in water phase, more water molecules would be more freely to move instead of having restriction on their arrangements. Thus, it is a thermodynamically favorable process for the pure, unprotected oil droplets to move out of water medium as the process is driven forward by Entropy.

Phase separation of oil and water is not only Entropy-driven, but is also driven forward to undo the increase in contact area between oil and water. Forming extra interfacial layer, as when oil droplets are in the water layer, increase the overall energy of the oil-water system.[17] This is because water and oil molecules at the interface are higher in energy compared to when they are in the middle and are surrounded on all directions by their own molecules. Thus, oil droplets would move out of water phase, after letting the mixture sit for a little, to get the change in interfacial area (ΔA) as small as possible in order to minimize the energy rise of the system (ΔG). The relationship between free energy change of a system and its interfacial area is expressed in the equation:

ΔG = γΔA

where ΔG is the increase in surface free energy, ΔA is the increase in surface area, and γ is the interfacial tension between the two liquids.

Emulsifying agent (lecithin) used in mayonnaise are able to suspend oil droplets in water because it lowers the interfacial tension γ between oil and water. When emulsifying agent, lecithin, is added to the oil and water emulsion, they are adsorbed onto the interfacial layer in a manner that their hydrophobic tail point toward the non-polar oil droplet, and their hydrophilic end facing the polar water molecules.[18] In the presence of lecithin, the interfacial tension γ is lower as now water molecules is not in contact with hydrocarbon molecules at the interface anymore. Hence, a large increase of surface area (ΔA) is made possible because energy cost to arrive at the food state is now favorable.[19]

Mayonnaise emulsions eventually break as the oil droplets coalesce, although the kinetics and the precise mechanisms by which the droplets coalesce are not fully understood. As samples of mayonnaise age, the size distribution of the oil droplets changed to produce fewer, larger droplets which eventually led to separation of the phases of the mayonnaise. The shift in droplet size could be measured either microscopically (through light or scanning electron micrographs) or by a decrease in the absorbance at 500 nm. When mayonnaise is stored at elevated temperatures, increases in Brownian motion of the droplets, decrease in the viscosity of the continuous phase, and solubilization of the surfactants all contribute to the breakdown of the emulsion.

Two unprotected oil droplets with small radii in water are favored thermodynamically to coalesce into one bigger droplet because the process yields a smaller surface area-to-volume ratio. The energetic contribution of the interfacial layer over that same volume of oil is minimized when the two droplets fuse together.[20] Thus, the coalescence process puts the system in a lower energy state and the process would occur spontaneously. However, when the oil droplets are coated with emulsifying agent, electrostatic repulsive force is introduced among the oil droplets which keeps the droplets from coming together.

Manufacturers usually try to reduce the oil content of mayonnaise as much as possible within the limits of the food regulations of the country the mayonnaise will be sold in. This is because the oil is usually the most expensive component of mayonnaise. Unfortunately, reducing the proportion of oil in mayonnaise reduces the density of the oil droplets. This means that the interactions between droplets are weakened and the emulsion becomes less stable. In the absence of strong inter-droplet interactions, low-fat emulsions separate under gravity in accordance with the Stokes equation:

where v is the creaming velocity, g is the acceleration due to gravity, r is the radius of the droplets, and ρ and η are the density and shear viscosity, respectively, of a given phase. The subscripts 1 and 2 refer to the continuous and dispersed phases, respectively. Stability of a medium-to-low-fat emulsion can be increased by reducing the size of the droplets, which also produces a product with a lighter, "creamier" appearance. Another possibility is to increase the viscosity of the continuous phase, and various products including proteins, dextrins and gums are available for this purpose.[21]

Viscoelastic Properties

As a semi-solid, mayonnaise has an extremely high viscosity and because of this, its flow properties have been studied extensively. Shear stress is an important term when discussing liquids and solids at any viscosity and is defined as the force per unit area that is required to drag one layer of substance past another layer. Rheology is the study of science that deals with the flow and deformation of matter and is an umbrella for a few of mayonnaise's properties. One of which includes yield stress which can be defined as a minimum shear stress required to initiate flow. So, with all of these terms now defined, one can look at the specific properties that mayonnaise possesses. Mayonnaise has a high shear stress with a typical yield stress around 100 Pascals). For reference, ketchup has a yield stress of about 15 Pascals. With such a high yield stress, mayonnaise is able to resist low forces and even return to its original conformation.[22] A simple equation can be written to explain the relationship between these terms:

In this equation, \tau is equal to the shear stress,\tau_0 is equal to the yield stress, \gamma is the shear rate and k & n are model parameters that influence the shape and curvature of the stress/rate curve. Mayonnaise happens to be a Bingham fluid where k is equal to the plasticity constant and n is equal to 1. This equation is in the form of y=mx+b and thus produces a straight line. In more laymen's terms, the yield stress is the tipping point for conformational change in the mayonnaise after initial force is applied and it is held constant.

Freezing Mayonnaise

Mayonnaise is an oil in water emulsion which is stable at room temperature because it reaches phase equilibrium. At freezing temperatures, the structures inside of mayonnaise undergo crystallization which is bad news depending on the type of emulsion. Butter is a water in oil emulsion with the water phase having a higher freezing point than oil. In the freezer, the small water droplets that are suspended in the continuous oil phase freeze in their specific locations while the rest of the oil stays in place. When the butter is needed, one only needs to take it out of the freezer and thaw it for the general properties of butter return as the water droplets melt in their respective locations. Mayonnaise is different; when oil in water emulsions are frozen, the continuous phase is water which freezes and allows the oil droplets to flocculate. This whole process causes a phase separation between the water and the oil. Once ice crystals start to form in the continuous water phase, they begin to inhibit the lecithin and phospholipids from working. These two emulsifying agents lose their functionality due to dehydration: water is crystallizing with itself and is leaving these agents "out to dry." The oil droplets begin to flocculate without the emulsifying agents keeping them separated.[23] At water's freezing point, this is enough to destabilize the mayonnaise emulsion but at even lower temperatures, the fused oil droplets reach their freezing points and fat crystal nucleation begins. Mayonnaise therefore, should not be stored at frozen temperatures due to their thermodynamic instability. Freezing of the water phase in mayonnaise is catastrophic to the stability and shelf-life of the entire product.

Preparation

File:Mayones.jpg
Making mayonnaise with a whisk

Mayonnaise can be made by hand with a mortar and pestle,[24] whisk, or fork, or with the aid of an electric mixer or blender. It is made by slowly adding oil to an egg yolk, while whisking vigorously to disperse the oil. The oil and the water in yolks form a base of the emulsion, while lecithin and protein from the yolks are the emulsifiers that stabilize it.[25][page needed] A combination of van der Waals interactions and electrostatic repulsion determine the bond strength among oil droplets. The high viscosity of mayonnaise is attributed to the total strength created by these two intermolecular forces.[26] Taste and further stabilize the emulsion, as mustard contains small amounts of lecithin.[27] If vinegar is added directly to the yolk, it can emulsify more oil, thus making more mayonnaise.[28]

For large-scale preparation of mayonnaise where mixing equipment is being employed, the process typically begins with the dispersal of eggs, either powdered or liquid, into water. Once emulsified, the remaining ingredients are then added and vigorously mixed until completely hydrated and evenly dispersed. Oil is then added as rapidly as it can be absorbed. Though only a small part of the total, ingredients other than the oil are critical to proper formulation. These must be totally hydrated and dispersed within a small liquid volume, which can cause difficulties including emulsion breakdown during the oil-adding phase. Often, a long agitation process is required to achieve proper dispersal/emulsification, presenting one of the trickiest phases of the production process.[29] Though, as technology in the food industry advances, processing has been shortened drastically, allowing roughly 1000 liters to be produced in 10 minutes.[30]

Microbial Spoilage

Microbial spoilage is a big category in spoilage of mayonnaise. Both commercially processed mayonnaise and home-made mayonnaise has been associated with illnesses from Salmonella globally. The source of Salmonella is confirmed to be from the raw eggs ingredient.[31] Several outbreaks with fatal cases have been recorded with a few major incidents. In 1955, there was an outbreak in Denmark with 10,000 people affected with Salmonella from contaminated mayonnaise made from large kitchen. The pH of mayonnaise was found to be 5.1 with Salmonella count of 180,000 per gram. The second outbreak also in Denmark has 41 infected cases in total with 2 fatalities. The pH of the contaminated mayonnaise was 6.0 with 6 million counts per gram. In 1976, there was serious salmonellosis outbreaks on four flights to and from Spain which caused 500 ill cases and 6 fatalities. In the US, 404 people became ill and 9 people died in a New York City hospital due to hospital-prepared mayonnaise.[32] In all Salmonellosis cases, the major reason was due to the improper acidification of the mayonnaise in which the pH level was higher than the recommended value of 4.1 or lower, with acetic acid as the main acidifying agent.[33]

Nutrient content of mayonnaise (>50% edible oil, 9-11% salt, 7-10% sugar in the aqueous phase) is suitable as food source for many spoilage organisms, the set of condition such as (low pH of 3.6 to 4.0, low water activity aw of 0.925) restricts the growth of yeasts, a few bacteria and molds.[34] Yeasts of the genus Saccharomyces (Lactobacillus fructivorans and Z. bailii) are the species that responsible for the spoilage mayonnaise. The characteristics of spoilage caused by Z.bailli are product separation and a “yeasty” odor. A study suggests that adding encapsulated cells of Bifidobacterium bifidum and B. infantis prolongs the life of mayonnaise up to 12 weeks without microorganism spoilage.

Uses

Mayonnaise from the Zaan district, North-Holland, Netherlands and French fries

Chile

Chile is the world's third major per capita consumer of mayonnaise and first in Latin America.[35] Mayonnaise became widely accessible in the 1980s.[35]

Europe

Guidelines issued in September 1991 by Europe's Federation of the Condiment Sauce Industries recommend that oil and liquid egg yolk levels in mayonnaise should be at least 70% and 5%, respectively. The Netherlands incorporated this guideline in 1998 into the law Warenwetbesluit Gereserveerde aanduidingen in article 4.[36] Most available brands easily exceed this target.[37]

North America

Commercial mayonnaise sold in jars originated in Philadelphia in 1907 when Amelia Schlorer decided to start selling her own mayonnaise recipe originally used in salads sold in the family grocery store. Mrs. Schlorer's mayonnaise was an instant success with local customers and eventually grew into the Schlorer Delicatessen Company.[38] Around the same time in New York City, a family from Vetschau, Germany, at Richard Hellmann's delicatessen on Columbus Avenue, featured his wife's homemade recipe in salads sold in their delicatessen. The condiment quickly became so popular that Hellmann began selling it in "wooden boats" that were used for weighing butter. In 1912, Mrs. Hellmann's mayonnaise was mass-marketed and later was trademarked in 1926 as Hellmann's Blue Ribbon Mayonnaise.[39]

Japan

Kewpie mayonnaise

Japanese mayonnaise is typically made with apple cider vinegar or rice vinegar and a small amount of MSG, which gives it a different flavor from mayonnaise made from distilled vinegar.[40][page needed][41] It is most often sold in soft plastic squeeze bottles. Its texture is thicker than most Western commercial mayonnaise.[42]

Apart from salads, it is popular with dishes such as okonomiyaki, takoyaki and yakisoba and may also accompany katsu and karaage.[43]

Kewpie (Q.P.) is the most popular brand of Japanese mayonnaise,[44] advertised with a Kewpie doll logo. The vinegar is a proprietary blend containing apple and malt vinegars.[45]

Russia

Mayonnaise is very popular in Russia, where it is made with sunflower seed oil. A 2004 study showed that Russia is the only market in Europe where mayonnaise is sold more than ketchup by volume. It is used as a sauce in the most popular salads in Russia, such as Olivier salad (also known as Russian salad), dressed herring, and many others. Leading brands are Calve (marketed by Unilever) and Sloboda (marketed by Efko).[46]

As a base for other sauces

Mayonnaise is the base for many other chilled sauces and salad dressings. For example, sauce rémoulade, in classic French cuisine, is mayonnaise to which has been added mustard, gherkins, capers, parsley, chervil, tarragon, and possibly anchovy essence.[47]

Nutritional information

A typical formulation for commercially made mayonnaise (not low fat) can contain as much as 80% vegetable oil, usually soybean but sometimes olive oil. Water makes up about 7% to 8% and egg yolks about 6%. Some formulas use whole eggs instead of just yolks. The remaining ingredients include vinegar (4%), salt (1%), and sugar (1%). Low-fat formulas will typically decrease oil content to just 50% and increase water content to about 35%. Egg content is reduced to 4% and vinegar to 3%. Sugar is increased to 1.5% and salt lowered to 0.7%. Gums or thickeners (4%) are added to increase viscosity, improve texture, and ensure a stable emulsion.[48]

Mayonnaise is prepared using several methods, but on average it contains around 700 kilocalories (2,900 kJ) per 100 grams, or 94 kilocalories (Cal) per tablespoon. This makes mayonnaise a calorically dense food.[49]

Egg-free alternatives

A vegan sandwich with egg-free mayonnaise

Egg-free versions of mayonnaise are available for vegans and others who want to avoid eggs, animal fat, and cholesterol, or who have egg allergies. In the U.S., these alternatives cannot be labelled as "mayonnaise" because of the FDA's definition of mayonnaise making egg a requirement.[50][51]

Well-known brands include Nayonaise and Vegenaise in North America, and Plamil Egg Free in the UK.[52][53][54]

In August 2015,[51] the United States Food and Drug Administration sent out a warning letter to the San Francisco company Hampton Creek,[55][56] objecting to the name of their "Just Mayo" product, which is not egg-based, so does not meet the U.S. legal definition of "mayonnaise".[51][57]

Egg-free mayonnaise is expected to contain soya or pea protein instead of lecithin in egg yolk as emulsifying agent to stabilize oil droplets in water.[58]

See also

References

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