Step 1

Add the amaretto to a cocktail shaker

Step 2

Add the lemon juice.

Step 3

Add the egg white.

Step 4

Add the simple syrup.

Step 5

Dry shake the cocktail for 15 seconds, until foamy.

Step 6

Add ice and shake again until the cocktail is chilled.

Step 7

Strain into a cocktail glass.

Step 8

Garnish the amaretto sour with a dash of bitters, an orange slice, and a cherry, and serve.