This South American cocktail is kind of a national drink or Peru and Chile where its main ingredient Pisco – a grape based brandy, is produced using specific type of grapes. This is a traditional Peruvian pisco sour recipe wherein Peruvian pisco, simple syrup and bitters are used. However, if you want to experience its Chilean version then replace them with Chilean pisco and 1-teaspoon bar sugar respectively and avoid bitters.