Dulce De Leche

A hybrid citrus fruit originating in Barbados as an accidental cross between two introduced species, sweet orange and pomelo. Like other citrus fruits the grapefruit is popular among cocktails for its peel and juice.

Aged (añejo) tequilas are aged at least 1 to 3 years in wooden containers often recycled from bourbon, cognac or wine production.

Also known as PX, this is the name of a white Spanish wine grape variety grown in several wine regions in Spain. It is intensely sweet and dark; a dessert sherry.

The butterfat layer skimmed from the top of milk before homogenization, contains more than 35% milk fat. Also called single/double cream and whipping cream, although these may also add thickening agents making them less useful for mixing in cocktails. This is used as a foaming agent and for fat-washing in cocktails.

You know what eggs are. In cocktails, eggs are used for their foaming properties, giving the drink a rich and creamy texture. The eggs proteins form a 'net' that traps air and liquid extremely well; for this reason, drinks that contain eggs are shaken. They are also used for egg washing, a type of booze washing. Some cocktails use only the egg white (fizzes) and some use the whole egg or only the yolk (flips). There are common non-egg substitutes out there, check out insta-foam