Add all the ingredients except the cream soda to a shaker.
Shake without ice to incorporate the egg white.
Fill with ice and shake again, vigorously.
Strain into a Collins glass filled with fresh ice.
Top with the cream soda and garnish with lime zest.
*Vanilla Bean-Infused Agave Syrup INGREDIENTS:
4 oz Raw agave nectar
4 oz Water
1 Vanilla bean, split in half lengthwise
PREPARATION: Stir together the agave nectar and water until fully combined. Add the vanilla bean and refrigerate for 12 to 24 hours. Watch San Francisco bartender Kevin Diedrich make a proper Soda Jerk in our How to Cocktail video.