The Whiskey Sour has a long history and is an evolution of older sours that were popular in the 19th century. The first written mention of the Whiskey Sour comes from a recipe book from 1862, where it is described as a simple mix of spirit, lemon juice and sugar. Various variations have been developed over the years, and the cocktail became particularly popular in the 1930s and 1940s. Today, the Whiskey Sour is a timeless classic in the world of cocktails.
