A Pisco Sour is a Peruvian cocktail containing pisco, lemon or lime juice, egg whites, simple syrup, and regionalbitters (like Amargo bitters, though Angostura bitters work if regional bitters are unavailable)

Ingredients:

• 2 fl oz (59.15 millilitres) (8 parts) Pisco
• 1 fl oz (29.57 millilitres) (4 parts) Lime juice
• 3/4 fl oz (118.29 millilitres) (3 part) Simple syrup
• 1 Egg white
• 1 dash Bitters

Preparation:

Shake hard or blend with ice and strain into glass. The bitters are an aromatic garnish topping the finished drink, put on top of pisco sour foam.