Peruvian Pisco Sour - cooking recipe

Ingredients

1 cup sugar
1 cup key lime juice
2 egg whites
12 ice cubes, crushed
3 drops Angostura bitters
2 cups Pisco

Preparation

Blend pisco with sugar, lemon juice and Angostrua Bitter.
Add ice and finally the egg whites.
Blend a few minutes.
Pour into small glasses and top with few drops of Angostura Bitter.