Prepare a 9x13'' cake pan or baking dish with cooking spray.
To the prepared dish, add apple pie filling. Sprinkle caramel bits over the top.
Next, layer dry cake mix over the top, smoothly with a spatula.
Finally, pour the melted butter over the top of the dry cake mix. Do not stir.
Bake for 45-50 minutes or until crust is golden brown and filling is bubbly.
Notes
You can also cut the cold butter into 1 tablespoon pats, and lay them directly on top of the dry cake mix. I have done it this way, and with melted butter, and it turns out great either way.