I don't know what made me think that this hot toddy would be sweet and tasty. Unfortunately, it just tastes like hot rum diluted with boiling water and melted butter + spices. Maybe it's the unsalted butter I used. I was expecting more flavor? Anyhow. Saveur magazine's recipe for this isn't that good. If I had the patience or the butter to make another base I would add a lot more sugar, or something.
Saveur's hot buttered rum base recipe:
1 3/4 c. butter, softened
1/4 tsp. each cinnamon, nutmeg, ground cloves
1 c. dark brown sugar
Mix well.
Per serving ingredients:
2 tbsp hot buttered rum base
1.5 oz dark rum
8 oz boiling water
To drink, add 2 heaping tbsp of hot buttered rum base to a mug, 1 1/2 oz dark rum, and add 8 oz. boiling water.
Stir and serve.