Yes, it’s called a layer cake, and pretty much any cake you buy at a grocery store is constructed in the same manner. Well, you’re wasting your time reading this, aren’t you?
I totally saw this on Something Awful’s Goons with Spoons Rainbow Cake thread, way to steal the idea, asshole. And in fact, I posted my original rainbow cake there.
Oh yes, and do me a favour: DOUBLE THE RECIPE AS PHOTOGRAPHED HERE!! This is so that your two pans are equal if your measurements aren’t exact (and they’re not likely to be). Sunny Day Rainbow Cake 2 boxes white cake mix 24 oz of clear diet soda (2 cans, ginger ale and sprite work well) gel food colouring 16 oz whipped topping 2 oz instant fat-free sugar-free pudding mix (2 smallish boxes) The Dieting Mix the cake mix with the soda according to regular instructions on box. Again, you can use any white cake recipe you want, this is just how I do it.
The recipe at the bottom is accurate, but this made for a really REALLY small cake, and there was not nearly enough frosting, especially considering its lightness. The Rainbowing Measure the total volume (by my estimate, 64 oz), then divide by 6 and measure into separate bowls.
Though I don’t need to defend my method thanks to the double-dub (WW) aspect, even when I make a “real” cake I usually use box mix because let’s face it: Betty’s been doing it way longer than I have, and has pretty much perfected the art.