Hot Buttered Rum is a delicious mixture of butter, sugar, spices, and ice cream plus rum. Served warm, it is a wonderful cocktail for winter.
Place butter and both sugars in a large bowl. Use a hand-held mixer to beat until smooth.
Beat in ice cream, cinnamon, and ginger.
Place in a plastic storage container, cover and freeze.
For each serving, place 1/2 cup of fozen mixture in a glass. Pour 1/2 cup boiling water over it. Stir to dissolve.
Stir in desired amount of rum.