A fantastic explosion of flavor!
Preheat over to 350°F and prepare your 9x9 inch pan. ( I baked mine at 325 in a convection oven.)
In a saucepan, add butter and all but 1/4 cup of blueberries and simmer over low heat until butter is melted. Remove from heat and add in mini chocolate chips. Stir until melted.
Sprinkle the reserved 1/4 cup of blueberries on top of the batter. (Optional: Add flour to the blueberries before sprinkling on the batter.)