Pink Lady

The pink lady is a classic gin-based cocktail with a long history. Its pink color comes from grenadine. The exact ingredients for the pink lady vary, but all variations have the use of gin, grenadine, and egg white in common. In its most basic form, the pink lady consists of just those three ingredients. According to the Cafe Royal Cocktail Book of 1937, it is made with a glass of gin, a tablespoon of grenadine, and the white of one egg, shaken and strained into a glass. Often lemon juice is added to the basic form. Another creamier version of the pink lady that has been around at least since the 1920s adds sweet cream to the basic form. In New Orleans, this version was also known as pink shimmy. In some recipes, the cream is not added to the basic form, but simply replaces the egg white, and sometimes lemon juice is added as well.

Source: Wikipedia