1 Betty Crocker butter pecan cake mix
1 can pineapple (crushed or tidbits)
3 cups blueberries
1/2 cup melted margarine
Spray a baking dish. Pour pineapple and juice over the bottom. Evenly spread blueberries over the pineapple. Open the cake mix and pour (dry) on top. Drizzle melted margarine on top. Bake at 350 for 45-50 minutes.
Serve with your favorite topping.