Made this 7x11 vanilla cake iced with buttercream for my husband's birthday this year. The accordion was the first instrument that he learned to play so he challenged me to make this for him. Very easy to do. I cut the corner off of one side so that the piano keys would be lower than the make part of the cake. Used the big Wilton icing tip to make the pleats. Next time I would ice the pleats smooth and use an edging comb instead to make the pleats. Thanks for looking.