1 1⁄2 oz CW Irwin Bourbon
3⁄4 oz Simple Syrup
Juice from 1⁄2 a lemon
3⁄4 oz Egg White

Fill cocktail shaker with ice, add all ingredients, and shake vigorously. Shake very hard to get the ingredients to emulsify and form a layer of foam on top of the cocktail. Strain into a chilled Old Fashioned glass.