Homemade Crumb Cake. I found this recipe in Martha Stewart’s Baking Handbook. I didn’t think the crumbs would come out crumbs because it was like a pasty substance when I put it on top of the cake before baking. It did turn out like crumbs though. This cake is rich and very flavorful! I believe I described it as “Serious.” lol. I ate a piece this size with a small glass of milk and I was FULL! You actually only need to eat half of the slice shown in the picture because this cake has so much flavor.