Instructions
- In a mug, combine 1 tablespoon of unsalted butter, 1 tablespoon of brown sugar, and a pinch of cinnamon and nutmeg.
- Add 2 ounces of dark rum to the mug.
- Fill the mug with hot water, leaving some space at the top.
- Stir until the butter and sugar are completely melted and combined.
- Garnish with a cinnamon stick and serve warm.