The Whiskey Sour is a classic cocktail made primarily with whiskey, fresh lemon juice, and sugar. It is typically served over ice in a short glass and can be garnished with a slice of lemon or a cherry. The drink balances the rich flavors of whiskey with the tartness of lemon, creating a refreshing taste. This cocktail has a long history, dating back to the 19th century, and is part of the broader category of sour cocktails. Variations may include the addition of egg white for a frothy texture or different types of whiskey, such as bourbon or rye.