Whiskey Sour

1 1/2 oz bourbon
1 oz lemon juice
1/2 oz simple syrup
1 egg white

Combine in an iced cocktail shaker.
Shake vigorously.
Strain into a cocktail glass.

McGee, Shirley. The Little Box of Cocktails – Cool and Classic Recipes. Königswinter, Germany: HEEL Verlag, GmbH, 2015.