These Blueberry Jam Bars are so berry delicious, we must say. We cannot stress this enough. They’re super addictive so use caution. We turned our Organic Vanilla Cake mix into a buttery crust and crumble then added our favorite blueberry jam. What we got was the taste of late summer in North America. This is a great way to use that special farmer’s market jam or your own home made preserves. We used Bonne Mamman Wild Blueberry Preserves and you’ll hear no complaints on that from us. Jam on, baker babes!