For the garnish: Cocktail cherry or Luxardo cherry
Instructions
Add the amaretto, bourbon, lemon juice, syrup, egg white, and to a cocktail shaker without ice. Shake for 15 seconds (skip this first step if you’re not using the egg white).
Add the ice to the cocktail shaker. Shake again for 30 seconds.
Strain the drink into a glass; the foam will collect at the top. Garnish with a cocktail cherry.