Redditor Two Plus Two is Fore thinks it was made by stacking and frosting different-colored sheet cakes, cut into rings and combined to make the pattern.
Update: We have a source!
@doctorow it was made by this company https://t.co/LNOkIiHYyC as one of their youtube tutorials. https://t.co/pGaBXFT700
— Chris Sm. (@poorstruggler) December 13, 2015