Step 1In the bowl of a food processor or mixer, combine the butter, banana, brown sugar, cinnamon, nutmeg, cloves, star anise and apple, blending until smooth. Place the mixture in plastic wrap and roll into a log. Refrigerate until firm. The log makes enough for more than one cocktail, and it will keep, covered and refrigerated, up to 1 week.
Step 1Cut a half-inch piece of the butter log and place into a coffee mug. Add the rum and fill the remainder of the mug with boiling water. Garnish with star anise.