01 -
Preheat your oven to 350°F. Grease a 9x13-inch baking dish lightly with butter.
02 -
Start by adding the pie filling evenly to the bottom of the dish. Then sprinkle the cake mix so it spreads evenly over the filling. Slice the butter thinly and layer the slices across the entire top. Lastly, sprinkle the fresh or frozen blueberries over everything.
03 -
Pop the dish into the oven and bake for 60 to 65 minutes. It’s done when the topping is crunchy, golden, and bubbly.
04 -
Dish it up warm, and if you'd like, pair it with some vanilla ice cream.