See how to make a quick, simple frosting to decorate your sugar cookies. In this video, you’ll see how to cream together shortening and sugar, mixing ... See morein milk and vanilla until you arrive at a perfectly smooth, stiff frosting. It’s so easy to make your own sugar-cooking frosting! Then just add a little food coloring, and you’re ready to start decorating! See Kathy’s 5-star recipe for Sugar Cookie Frosting.