Pisco Sour - cooking recipe

Ingredients

1/2 cup sugar
1/4 cup water
1/2 cup key lime juice
1 1/2 cups Pisco
3 egg whites
1 1/2 cups ice
Angostura bitters

Preparation

Make sugar syrup: Put sugar and water in a pot and bring to a boil. Boil for 1 minute, remove from heat, and let cool.
Place sugar syrup, lemon juice. pisco, egg whites, and ice in a blender, and mix until very frothy.
Serve in small tumblers, with a dash of bitters in the middle of the foam.