Hard sauce

Hard sauce is a cold dessert sauce made by creaming or beating butter and sugar with rum, brandy, whiskey, vanilla or other flavoring. It is typically served with plum pudding, bread pudding, Indian pudding, hasty pudding, and other heavy puddings as well as with fruitcakes and gingerbread. An example of such a sauce is brandy butter.

Though it is called a sauce, it is neither a liquid nor smooth. It could be more accurately classified as a spread and has the consistency of butter. It is easy to make and keeps for months under refrigeration. It can be pressed into a decorative mold before chilling.