¼ cup butter
½ cup confectioners’ sugar
½ cup cold water
1½ teaspoons cornstarch
1 teaspoon vanilla
½ teaspoon vinegar
Cream butter; gradually add sifted confectioners’ sugar, creaming until
fluffy. Stir cold water into cornstarch; cook and stir until clear and
thick. Stir hot mixture into butter mixture; add vanilla and vinegar.
Serve warm. Makes about ¾ cup.