This is random, but what is the middle (and bottom) layer of the cake called? It’s always a slightly darker brown color and in the middle it has icing between it. I’m asking because to me it tastes better than the actual cake! I always scrape the pan to eat it because it’s so moist. Also, is it possible to create a completely made up of that part? I know that it’s odd but I want to know if it is possible. Thank you.