I can't lie, there is not really much to this cake. I take pride in my cakes that I cake from scratch, and I feel like I make a darn good cake. So, when the fiancee wanted a funfetti cake for his birthday it was a blow to my ego. Really? I can make you anything you want and you want funfetti. Apparently 22 year old men like rainbow sprinkles in their cake.
I used a typical jimmy. The long slender ones. I don't think that sugars, round discs, or nonpareils would be effective. But that is another experiment for another day. If you try out a few other sprinkles let me know how they work out.