Batter: In a large bowl, using a hand mixer cream together the butter, brown sugar, confectioners’ sugar, and spices. Add the ice cream, beat until well combined. Store the batter in an airtight container in the freezer until ready to use.
To make Hot Buttered Rum Drink: Place 2 heaping tablespoons of batter into a mug, add a shot of rum, and 6 ounces of boiling water. Stir to combine. Top with whipped cream and a sprinkle of cinnamon or nutmeg if desired. Enjoy!