Limoncello (Italian pronunciation: [limonˈtʃɛllo]) is an Italian lemon liqueur mainly produced in Southern Italy, especially in the region around the Gulf of Naples, the Sorrentine Peninsula and the coast of Amalfi and islands of Procida, Ischia and Capri. It is also produced in Sicily, Sardinia, Menton in France, and the Maltese island of Gozo. Though there is debate about the exact origin of the drink, it is at least one hundred years old.
Traditionally, it is made from the zest of Femminello St. Teresa lemons, also known as Sorrento lemons or Sfusato Lemons.  Lemon zest, or peels without the pith, are steeped in grain alcohol until the oil is released. The resulting yellow liquid is then mixed with simple syrup. Clarity and viscosity are affected by factors like the relative temperatures of the two liquids. Most lemons, including the more-common Eureka lemon, will produce satisfactory limoncello.
Limoncello is traditionally served chilled as an after-dinner digestivo. Along the Amalfi Coast, it is usually served in small ceramic glasses themselves often chilled, the Amalfi coast being a center of both ceramics and limoncello production. This tradition has been carried into other parts of Italy.
Limoncello is the second most popular liqueur in Italy  but has recently become popular in other parts of the world. Restaurants in the United States, Canada, the United Kingdom, Australia, and New Zealand are increasingly offering limoncello on their beverage and dessert menus. In the United States commercial producers using California lemons, which comprise over 90% of lemon crops in the US, have introduced USA commercially-made limoncello, including Rometti Limoncello, Ventura Limoncello, and Fabrizia Limoncello. Limoncello is an increasingly popular ingredient in cocktails. Limoncello imparts a strong lemon flavor without the sourness or bitterness of lemon juice.
An ethanol content of 31.5-32% is considered optimal for Limoncello.
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