I already mentioned the value of parchment paper. Don't try without it!
I had purchased three boxes of cake mix and five tubs of frosting because they were on sale and I didn't know how much I would need. (I didn't make from scratch like the other sites did. Come on. Why?)
I used two cake mixes and three tubs of frosting.
Step three: Separate batter of first cake mix into four separate bowls.
Step four: Dye each bowl a different color: Red, Pink, Orange, and Yellow.
Step five: Cut parchment and place in bottom of pans. Pour in batter and bake for about ten minutes (at temperature recommended on box mix).
Once they have been in the freezer a while, then you can go ahead and frost them. I took them out of the freezer one at a time. It can take a while to frost, and I didn't want to get half way through and find out they'd thawed enough that I was having difficulty frosting them.
The party wasn't for two days. (I started early because I wanted time to do-over if I messed up.) I left it out on the counter (covered) because my husband it would dry out in the refrigerator. The day of the party I noticed that the frosting was starting to "melt" or slide a bit. I popped it into the refrigerator for a couple of hours.
The kids loved, loved, loved the cake. They were so proud, feeling like they had helped make it.
So worth the effort. I can see all kinds of applications for this... Little Artist Birthday Party... Shades of pink and purple for a girl party... my imagination is really going...