This Crumb Cake with Blueberries has mountains of buttery crumbs topped with sugar, a soft thin cake and a sweet layer of blueberry jam. Best yet, it's gluten free, eggless, nut free & easily vegan!
Dollop the blueberry jam all over the top of the batter. Make sure not to use any excess liquid. You can strain the 3 tablespoons if need be (if your jam is super liquidy). Use a knife to spread it around.