When life gives you lemons, make lemon buttercream frosting! This zesty lemon frosting recipe is perfect for all lemon lovers with its creamy texture and sweet zip of citrus flavor. Lemon buttercream is one of those icings that goes on almost any dessert. We especially like it in combination with Margarita Cupcakes, White Grape Juice Cupcakes and lemon cakes (of course!). Add this light and tart lemon frosting to any of your sweet treats, including cakes, cupcakes and cookies.
In large bowl, cream shortening and butter with electric mixer until light and fluffy. Add lemon juice and zest; beat well. Gradually add sugar, one cup at a time, beating well on medium speed. Scrape sides and bottom of bowl often. When all sugar has been mixed in, if icing is dry, add additional juice or milk and beat at medium speed until light and fluffy.
Keep icing covered with a damp cloth until ready to use. For best results, keep icing bowl in refrigerator when not in use. Re-whip before using.