Pisco Sour is a Peruvian cocktail made with a combination of Pisco brandy, lime juice, sugar syrup, and egg whites. The ingredients are shaken with ice and then strained into an old-fashioned glass. The cocktail is traditionally garnished with Amargo Chancho bitters, but Angostura bitters are widely used today.
The first Pisco Sour was made in the early 1920s in Lima by an American bartender Victor Vaughn Morris. Today, there is still an ongoing debate about Pisco Sour’s origin, with Peru and Chile both claiming that their nation is the home of the first Pisco.