Hard sauce

The traditional accompaniment for plum pudding, hard sauce is made by beating butter, sugar and flavoring together until smooth and creamy. The sugar can be confectioners', granulated or brown. The flavoring is generally brandy, rum or whiskey, though vanilla or other extracts may also be used. This mixture is refrigerated until hard (the texture of butter). It’s often spooned into a decorative mold before chilling and unmolded before serving. Hard sauce is known in England as "brandy butter".