Mix softened butter, confectioners sugar and egg yolks until creamy. Beat egg whites stiff, fold into butter mixture.

Half recipe makes medium size bowl full 1lb = 3 3/4 cups unsifted powered sugar

To make a Tom and Jerry, fill a cup of hot water with spiced rum or brandy, warm milk, hot cocoa, or eggnog and stir in 1 heaping tablespoon of batter.