Really Really Sour Foam Shot

This shot is for those who want a potent, sour kick with a unique texture. The foam will take you by surprise, but it complements the sourness of the drink perfectly. Here are the ingredients: - 1 oz. lemon juice - 1 oz. lime juice - 1 oz. simple syrup - 1 oz. vodka - 1 egg white - 1/4 tsp. citric acid - Ice Instructions: 1. Combine all the ingredients except the ice in a cocktail shaker. 2. Dry shake (shake without ice) for 10-15 seconds to emulsify the egg white. 3. Add ice to the shaker and shake it vigorously for 10-15 seconds. 4. Strain the cocktail into a shot glass. 5. To make the foam, pour the leftover cocktail mixture into a small mixing bowl. Add 1/4 tsp. citric acid and whisk until you get a fluffy foam. 6. Spoon the foam over the shot glass and serve immediately. Enjoy the sour, tangy taste and the unique texture of the foam!