A few years ago my friend, Amy, and I took a cake decorating class at Michael's. It was something fun to do together and I never really expected to use the skills I learned. The buttercream icing recipe I use is the Wilton's Buttercream Icing. I do not use shortening when making it though. I hate the taste and greasiness of the shortening. My basics are butter, powdered sugar, vanilla and milk. I have found that I only like the flavor of the CH powdered sugar and what brand butter you use makes a difference too.