The Preparation
Add amaretto, whiskey, lemon juice, simple syrup, and egg white to a cocktail shaker WITHOUT ice.
Dry shake vigorously for 15 seconds to emulsify the egg white.
Add ice to the shaker.
Shake again for 30 seconds until very cold.
Strain into a glass. The foam from the egg white should sit on top.
Garnish with a cocktail cherry.