01 -
Preheat the oven to 350°F and grease a 9x13-inch baking dish lightly with butter.
02 -
Add the pie filling to the dish and spread it out evenly. Sprinkle the cake mix over it without mixing. Slice the butter thin and scatter it across the top. Lastly, sprinkle on your blueberries.
03 -
Put it in the oven and bake for 60-65 minutes until the top looks golden brown and crispy, and you see bubbling around the edges.
04 -
Enjoy warm, with some vanilla ice cream if you'd like.