In cocktails, egg white foam adds a rich, creamy texture and a slightly sweet flavor. It’s especially popular in martinis and other shaken drinks.

To make egg white foam, you’ll need:

-1/2 oz. fresh lemon juice

-1 1/2 oz. gin

-1/2 oz. dry vermouth

-1 egg white

Add all of the ingredients to a shaker filled with ice. Shake well and strain into a chilled glass.

To make the egg white foam, add the egg white to a small bowl. …