½ cup butter or margarine
1 tsp vanilla
4 cups sifted confectioners sugar
2 tablespoon milk
In a large bowl, cream butter and shortening with electric mixer. Add vanilla. Gradually add sugar, one cup at a time, beating well on medium speed. Scrape sides and bottom of bowl often. When all the sugar has been mixed in, icing will appear dry. Add milk and beat at high speed until light and fluffy. Keep icing covered with a damp cloth until you’re ready to decorate. For best results, keep icing in refrigerator when not using it. Icing can be refrigerated in an airtight container for up to a week. Rewhip before using. Makes 3 cups.