Making the hot buttered rum batter: in a small bowl, cream butter and sugars. Add the cinnamon and nutmeg and stir. Add softened ice cream and beat until fully combined. (Note: The batter will make approximately 8-10 servings.)
Add 2 Tbsp. of the batter to a mug. Pour over 1 oz. (a shot) of spiced rum. For an extra-strong drink, go with 2 oz. of rum. Add 6-8 oz of boiling water.
Top with whipped cream or my Homemade Cool Whip. Enjoy right away while hot.
Notes
Freeze the remaining batter in an airtight, freezer-safe container for later use.A serving of batter is approximately 2 tablespoons. This recipe will make approximately 16 servings.