A silky, creamy peanut butter icing from Southern Living — confectioner's sugar, creamy peanut butter, unsalted butter, vanilla, and salt beaten together at medium-low speed, then finished with heavy cream beaten on high until light and smooth. The perfect frosting for chocolate cake, chocolate cupcakes, or brownies.
Beat the cream in at high speed for a full minute to create a light, fluffy texture. Under-beating produces a dense, heavy frosting.