This is one of the 2 recipes I use, depending on what I’m craving:

1 stick unsalted butter, softened

2 cups brown sugar

1 tsp cinnamon

1/2 tsp nutmeg

pinch cloves

pinch salt

bottle dark rum

boiling water

In a bowl, cream together the butter, sugar, cinnamon, nutmeg, cloves and salt.  Refrigerate until almost firm.  Spoon about 2 tbsp of the butter mixture into a mug, add 3 oz rum, top with boiling water and stir well.