Rainbow cake with Gummi Butterflies and Marshmallow Clouds. I made this using a bundt cake pan and cutting the cake in half. This made 2 perfect rainbow shapes that I frosted, decorated with cereal and added large marshmallows for clouds. The gummi butterflies added that final touch!
If you want to make a cake using a specific character you can use a coloring book page of that character to guide the process with a handy tutorial from household weblog Brass Tacks and Basics. In addition to the coloring page you'll need wax paper, buttercreme frosting, and food color drops.
St Patrick's Day rainbow leprechaun-trap-cake! Fun! Need an Angel Food Cake Pan? http://www.cheftools.com/Angel-Food-Tube-Cake-Pans/products/1093/ Need food coloring gel? http://www.cheftools.com/Gel-Paste-Food-Coloring/products/1328/