I know of one muffin mix that has a breakfast cake recipe on the side of the box. (Of course I made them last night and threw the box away).
You make the flour-brown sugar-oatmeal-butter topping and bake it in a 9x9 pan. Not sure of the particulars though. I found this at Cooks.com. They had a few more...may be worth checking out! This recipe must be the one with the blueberries in the little can because it says to wash them, and possibly mix the berries with the preserves.
COFFEE CAKE:
1 pkg. blueberry muffin mix
1/3 c. dairy sour cream
1/4 c. milk
1 egg
1/4 c. blueberry preserves
GLAZE:
1/2 c. confectioners sugar
2 1/2 tsp. water
Preheat oven to 375 degrees. Grease an 8 or 9 inch round cake or pie pan. Rinse blueberries with cold water. For coffee cake: Combine dry muffin mix, sour cream, milk and egg in bowl. Stir until moistened. Spread half of batter into pan. Spread half of blueberry mixture on top of batter. Spread remaining batter over blueberry layer. Spread remaining fruit on top, avoiding edges. Bake at 375 degrees for 30 to 35 minutes or until golden.
For glaze, combine confectioners sugar and water in small bowl; stir until smooth. Drizzle over hot coffee cake.
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