3 c. canned, drained, or fresh blueberries
1/2 c. sugar
1 box cake mix
1 1/2 sticks butter

Spray 9x13 inch pan with Pam. Add blueberries; sprinkle with sugar. Put cake mix on top of berries. Drizzle melted butter on top of mix. Bake at 350 degrees for 40-45 minutes or until done.