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A typical panino with salame, mortadella, tomatoes and lettuce.
|Alternative name(s)||Panini, panino imbottito|
|Place of origin||Italy|
|Serving temperature||Warm or room temperature|
|Main ingredient(s)||Bread (not sliced bread), filling (salami, ham, cheese, mortadella)|
In Italy, panino (Italian pronunciation: [paˈniːno]) is the word for a sandwich made from bread other than sliced bread, in which case Italians call it a tramezzino. Examples of bread types used are ciabatta, rosetta and baguette. The bread is cut horizontally and filled with deli ingredients such as salami, ham, cheese, mortadella, or other food, and sometimes served warm after having been pressed by a warming grill. A toasted sandwich made from sliced bread is not called "panino" but "toast" by Italians, and is usually filled with ham and a few slices of cheese, and heated in sandwich press. A popular version of panino in Central Italy is filled with porchetta, slices of pork roasted with salt, rosemary, and sage.
In the United States, United Kingdom and Canada, the term panini has been adopted to refer to pressed and toasted sandwiches; there is widespread availability and use of sandwich presses, often known as "panini presses" or "toasted sandwich makers."
The word panino [pa'ni:no] is Italian for "small bread roll"; its plural form is panini. The word is the diminutive form of pane (bread). In some English- and French-speaking countries, panini is sometimes used as a singular word (like salami, also an Italian plural noun) and sometimes pluralized as paninis.
In Italian, panino refers properly to a bread roll and panino imbottito (stuffed panino) to a sandwich. Paninoteca is the word for a sandwich bar.
Panino is also often used to refer to a sandwich in general.
Although the first U.S. reference to panini dates to 1956, and a precursor appeared in a 16th-century Italian cookbook, the sandwiches became trendy in Milanese bars, called paninoteche, in the 1970s and 1980s. Trendy U.S. restaurants, particularly in New York, began selling panini, whose popularity then spread to other U.S. cities, each producing distinctive variations of it.
During the 1980s, the term paninaro was used to denote a youngsters' culture typical of teenagers supposed to eat and meet in sandwich bars such as Milan's Al Panino and then in the first US-style fast food restaurants opened in Italy. Paninari were depicted as fashion-fixated, vain individuals, delighting in showcasing early 1980s status symbols such as Timberland shoes, Moncler accessories, Ray-Ban sunglasses, and articles from Armani, Coveri, Controvento. They were lampooned in the Italia 1 comedy show Drive-in by Enzo Braschi. A track entitled "Paninaro" appears on Pet Shop Boys' albums Disco and Alternative.
Panini Sandwich Grills
Commercial Panini Sandwich Grill
A Panini press or grill is a type of contact grill designed specifically for heating sandwiches, meat products, vegetables, or specialty menu items. Almost exclusively powered by electric elements, it comprises a heated bottom plate that is fixed, with a heated top plate that closes on, and comes in contact with the food. The function of the Panini grill is to heat food to an appropriate internal temperature with desirable external characteristics (i.e. – food safe, melted cheese, crisp finish, grill marks). 
Designed for countertop use, these appliances meet the operational need for fast, consistent production of a la carte or small batch cooked products. Commercial Panini grills are a system of three main characteristics: (1) Platen Geometry & Material (2) Electrical Power, and (3) Hinge Mechanism & Contact. The various combinations of these individual aspects affect the performance of the Panini. Performance is defined by such aspects as cooking time, finish of the cooked product, ease of operation & maintenance, and durability. 
Platen Geometry, Material & Finish
The most important consideration is what the finished food product needs to look like – with grill marks or without. As noted above, distinct grill marks are the hallmark of a true Panini sandwich and add aesthetic appeal to meats and other foods. Platens may be available with grooves on both sides, flat on both sides, or with a flat bottom and grooved top. Typical sizes for commercial applications are 14 in (356 mm) square, or double-sized units approximately 28 in (711 mm) wide and 14 in (356 mm) deep with a single bottom platen and 
Cast iron has the highest heat capacity and the greatest mass, and therefore has better heat retention for cooking products that demand a greater heat load, including meats, proteins and frozen products. This material also has three times the weight of an equivalent aluminum platen, which can be useful if it is desirable to ‘press’ the product firmly. A Cuban sandwich, for example.
Aluminum has the highest heat transfer rate – nearly five times that of cast iron. As a result, the surface temperatures of an aluminum platen will be more consistent, and recovery from load can be more rapid, depending on the type of thermostat controls and the wattage rating of the heating elements. Because aluminum is much lighter than iron, the top platen isn’t as heavy and won’t tend to ‘press’ the product, which is a desirable characteristic for more delicate products like tortillas, quesadillas, burritos, wraps and grilled sandwiches like the Melt and Rueben. 
Non-stick coatings such as Teflon are also available for some Panini grill platens. These coatings are typically applied to aluminum surfaces for optimal adhesion and durability, and facilitate kitchen cleaning operations. Extra care must be taken to prevent damage to such surfaces, which can be scraped, abraded and flake off if not cleaned properly and consistently.
Countertop Panini grills are most often rated for 120-Volt (common to most homes and businesses in North America), 208-Volt and 240-Volt service. Power is measured in watts (or kilowatts), and is directly related to the applicable voltage and the amperage draw. Power = Voltage x Amperage, so a unit operating at 120V and 15 Amps has 120 x 15 = 1800 Watts. This can be important in determining operational needs if other factors are equal, as well as the size and rating of wiring and circuit breakers. 
Panini grills with aluminum platens often do not require as much power as a cast iron unit with the same geometry. Because of the its high heat-transfer rate, high power draw in an aluminum plate could result in excess temperatures that burn the exterior of a food product before the interior has been heated to the desired temperature. Higher power ratings for the heavier cast iron platens are required due to their greater mass and heat capacity.
Hinge Mechanism & Contact
The type of hinge mechanism and the manner by which the top platen contacts the food product is one of the most important characteristics of a Panini grill, though it is often over-looked. The hinge on a Panini must be large enough to accommodate thick bread and tall sandwiches, as well as flat buns and thin cooked products. The hinge mechanism is a common failure point where components tend to degrade and loosen over time. The hinge and platen construction also dictate the manner in which the platen contacts the food – either flat, or at an angle. Both of these factors change operating characteristics and cooking quality of the appliance.
There are two basic styles of hinge commonly used, and more advanced, patented styles available through a variety of manufacturers.
The torsion spring is the most commonly used hinge style for this product category, and the least expensive. It is the default standard for residential grade products, though heavier versions are found in light-duty commercial grade Panini grills. Life expectancy of a commercial torsion spring hinge may be as high as 100,000 cycles, depending on the manufacturer, and considerably less for residential grade grills. Best suited for light-duty, low-volume applications where cost is a factor.
The counterweight-style hinge utilizes bearings or bushings at the pivot point, and an additional weight opposite the platen to balance the load. The resulting balanced weight of the platen, typically 3 lb (1.4 kg) to 5 lb (2.3 kg), is enough to maintain good contact and compression on sandwiches and meat products. This mechanism has fewer failure modes and will last considerably longer than torsion spring versions, with tests on some models exceeding 1,000,000 cycles.
Disadvantages to torsion spring and counterweight hinge mechanisms can be the steep angle the top platen makes to the bottom platen when making contact with the food product. Platen contact at this angle has two detrimental effects on the cooked product: Uneven compression, which tends to displace internal contents of sandwich products, and uneven heating of the cooked product which results in uneven coloring and even localized burning. Alternative construction methods tend to mitigate these problems.
A ‘floating head’ design allows platen heads to self-level when in contact with the food, which reduces the tendency to displace sandwich contents, and generally improves heated contact between top and bottom platens. Level of the top platen will be affected by the food products, and if uneven by geometry or placement, the top platen may still contact at an angle. 
Other hinge and platen mechanisms optimize food product contact with a modified lift mechanism that maintains parallelism between the top and bottom platens over a prescribed distance, and then inclining at an angle similar to those of typical designs. This technique ensures consistent contact over the entire surface, and tends to be more durable than other designs due to reduced mechanical stress. Typically used in high-volume applications where these characteristics are important, and offset the increased cost of the construction. 
- Croque-monsieur, a French sandwich
- Cuban sandwich
- Grilled cheese sandwich, an American sandwich
- Middleby, a Panini Sandwich Grill manufacturer
- Krampouz, a Panini machines manufacturer
- Pani ca meusa, an Sicilian sandwich
- Sandwich toaster, a press for alternative sandwiches
- Submarine sandwich, an American sandwich
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