Pisco, fresh lime, egg white, and Angostura bitters on the foam — South America's great national cocktail.
The Pisco Sour was created around 1920 by Victor Vaughen Morris, an American bartender who opened Morris's Bar in Lima, Peru. His barman, Mario Bruiget, later perfected the recipe with egg white and bitters. Both Peru and Chile claim pisco as their national spirit and the cocktail as their national drink — this is a serious diplomatic dispute, not a bar argument.
Peruvian pisco (from Quebranta, Italia, Torontel, or Albilla grapes) is different from Chilean pisco (often aged in barrels). Peruvian is the traditional choice for a Pisco Sour and tends to be unaged, with a distinctive grape character. Chilean tends to be smoother and sometimes sweeter. Both work; both Peruvians and Chileans will tell you only their version is correct.
Add 1 oz passion fruit purée alongside the lime. Replace simple syrup with passion fruit syrup. The most popular Pisco Sour variation in Lima.
Replace the egg white and sour elements with 4 oz ginger ale and build over ice in a highball. The simpler Peruvian 'everyday' pisco drink.
Add a splash of chicha morada (purple corn drink from Peru). The corn adds earthiness and colour. Very traditional.