The Drake's Return
Citrus-Mint Foam In the canister of a cream whipper (see Note), combine 1 ounce orange curaçao, 3 ounces simple syrup, 2 ounces fresh lime juice, 1 large egg white and 4 mint leaves. Seal the canister, shake hard and charge twice according to the manufacturer’s directions, using 1 or 2 nitrous oxide chargers; shake well between charges. Refrigerate for 1 hour. Shake before using. Makes enough foam for 4 drinks.
Cream whippers and nitrous oxide chargers are sold at kitchenware shops and surlatable.com.