Citron Shake

Ingredients

1. 1 1/2 ounces gin
2. 3/4 ounce limoncello (lemon-flavored liqueur)
3. 1/2 ounce heavy cream
4. 1 large egg white
5. 1/2 ounce Simple Syrup
6. Ice
7. 1/2 teaspoon finely grated lemon zest

1. In a cocktail shaker, combine all of the ingredients except the ice and grated lemon zest. Shake vigorously for 30 seconds. Add ice, then shake again. Strain into a chilled martini glass. Garnish with the grated lemon zest.