Oh, I forgot...Boo celebrated a birthday while we were visiting our family last month. And after mentioning that I wanted to make him a rainbow cake...I did! Well, it's not true to rainbow colors, but it's still pretty rad (I got carried away following the color suggestions on the back of the box of food coloring...so it's more like Easter eggs - haha).
The little line/indentation there is from the toothpick that I used to keep the wrap off the frosting. I took this the day after the party (it was too crazy to get a good pic then). I used a white cake recipe and just made it into six layers. The frosting is a cream cheese frosting...and of course, rainbow sprinkles!
The best part was that I didn't tell most people what was under the frosting...so it was a surprise!