Step 1: Make the Butter Batter : In a small bowl, combine softened butter, brown sugar, cinnamon, nutmeg, cloves, salt, and vanilla extract. Mix until smooth and creamy.
Step 2: Prepare the Drink : Place about 2 tablespoons of the butter batter into each mug.
Step 3: Add Rum and Hot Water : Pour 2 ounces of dark rum and about ¾ cup of hot (not boiling) water into each mug.
Step 4: Stir to Combine : Stir well until the butter is fully melted and the mixture becomes creamy and fragrant.
Step 5: Garnish and Serve : Top with a cinnamon stick, a sprinkle of nutmeg, or a dollop of whipped cream. Serve immediately while steaming hot.