Gather supplies. (If desired, fold a 1/4 cup of sugar in with the blueberries, this sweetens the berries and helps to pull out the juices.)
Spray 13x9 pan , or Ramekins with cooking spray.
Pour blueberries into your baking dish.
Combine cake mix, melted butter and cinnamon, stir until combined.
Crumble dough over berries.
Line a baking sheet with foil to catch any blueberries that may boil over.
Bake 30-40 minutes at 350 degrees. Serve warm...
A la mode!