Rum Old Fashioned
As cited in Harry Craddock’s Savoy Cocktail book, the old fashioned “can be made with Brandy, Gin, Rum, etc., instead of Rye Whiskey.” All you need is a good measure of rum, 15 ml of sugar syrup (try demerara), 2 dashes of Angostura bitters and an orange peel for garnish.