This idea came from my 5-year-old and my husband. She wanted a rainbow birthday cake for her 5th birthday party and my hubby suggested using Skittles for the colors.
I just made a HUGE round cake, cut it in half and cut the inside of the half circle out to form the shape. Then using a 9×13 inch cake, I cut out two cloud shapes and added them to the bottom of the rainbow. I frosted the entire cake with white frosting (my favorite is cream cheese frosting).
Then, I covered the rainbow with Skittles. I had to use the giant 42 oz. bag to get enough red candies. But, there were no blue Skittles, so I had to buy a large bag of the berry flavor Skittles that come in the purple bag. The clouds were made with miniature marshmallows.
The result was very bright and beautiful! You could also use M&Ms if you like the chocolate, but you’d have to find purple M&Ms somewhere.