Preheat oven to 350 degrees. Cut large biscuits in quarters. Have melted butter in one bowl and cinnamon/sugar mixture in another bowl. Use a 9 inch square or round baking dish that has been sprayed with cooking spray. Dip each quarter of biscuit first in butter and then in cinnamon/sugar, coating all of biscuit well. Arrange in baking dish until all of biscuit quarters have been used. Arrange blueberries on top, mashing down into biscuits just a litle with hand or a spoon. (If you want to take the time, you can cut blueberries in half.) Drizzle any leftover butter on top. Bake for 20 minutes or accordingly as your oven temperature allows.