The whiskey sour is a mixed drink containing whiskey, lemon juice, sugar, and optionally, a dash of egg white or cocktails foamer. Spirit, citrus and sugar combined to form the classic sour, one of the oldest types of cocktails. With the egg white, it is sometimes called a Boston Sour. The oldest historical mention of a whiskey sour was published in the Wisconsin newspaper, Waukesha Plain Dealer, in 1870.
A pisco sour is an alcoholic cocktail of Peruvian origin that is typical of the cuisines from Peru and Chile. The drink's name comes from pisco, which is its base liquor, and the cocktail term sour, in reference to sour citrus juice and sweetener components. The cocktail as it is known today was invented in the early 1920s in Lima, the capital of Peru, by the American bartender Victor Vaughen Morris.
The New York Sour is a cocktail similar to the whiskey sour, but it adds a float of dry red wine to the drink. The New York Sour is one of those cocktails that is relatively simple to execute, yet looks impressive and tastes complex. The Whiskey Sour comes from the mid-19th century and is believed to have first appeared in print in the 1862 edition of the famed "Jerry Thomas Bartenders Guide."