This Blueberry Crumb Cake has mountains of buttery crumbs topped with sugar, a soft thin cake and a sweet layer of blueberry jam. You can even top this berry crumb cake with a blueberry glaze! It's everything you adore about New York Crumb Cake but slightly sweeter and perfect for any berry lover! Best part is, you would never know it's gluten free, eggless, nut free and can easily be dairy free (vegan)!