Hot Rum Cow

I made a new drink tonight, delicious.

From The Kitchn:
Hot Rum Cow

8 ounces milk
1.5 ounces dark rum
1 oz Licor 43 (my special addition)
1 drop aromatic cocktail bitters
1 drop vanilla extract
brown sugar
grated cinnamon and/or nutmeg for sprinkling

Heat the milk in a saucepan on low, taking care not to scorch it. Meanwhile combine bitters, vanilla, and rum in a mug (I pre-warmed mine by filling it first with a bit of hot water, allowing it to stand a minute, and then emptying it before adding the ingredients). Top up with warm milk and stir in brown sugar to taste (I used a single teaspoon of it). Sprinkle with cinnamon and/or nutmeg.