Pisco Sour
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*Bartender recipe (serves 1)*

1 lime
2 oz Pisco
sugar or simple syrup 
cracked ice
egg white (optional)

Moisten the rim of a stemmed glass with lime and dip into powdered sugar. 
Shake all ingredients in a cocktail shaker and strain into glass. Add a drip of angostura
and garnish with a small lime wedge.

If too sour, add a little more sugar or simple syrup.
If too strong, it's just right.