Instructions
- In a heatproof mug, combine 1 tbsp of brown sugar with 1 tbsp of unsalted butter.
- Add a pinch of cinnamon and a pinch of nutmeg to the mixture.
- Pour in 2 ounces of dark rum.
- Top with hot water (about 6 ounces) and stir well to combine all ingredients.
- Garnish with a sprinkle of nutmeg.