If you’re going to serve this drink with a caramelized-sugar rim, choose a short glass or mug, so that the flame can reach the sugar rim. Rub the outside lip of the glass with an orange slice. Invert the glass and press the rim into a dish of superfine sugar. Next, make the whipped cream. Add the whipping cream to a shaker, and add a splash of orange curaçao. Drop in the spring from a Hawthorne strainer and shake it all without ice for about ten seconds. Alternately, you can whip the cream and liqueur in a bowl with a whisk if you prefer. If you’re doing the caramelized rim, add the rum and orange curaçao to the glass, and light with a long match. Let it burn for a few seconds, long enough to caramelize the sugar rim. Add the remaining ingredients to the mug. If you’re not doing the caramelized rum, add all the ingredients directly to the mug. Stir to mix, and top with the whipped cream you made earlier.