Preheat the oven to 350°F and lightly grease a 9x13-inch casserole dish with nonstick cooking spray.
Spread the apple pie filling evenly across the bottom of the prepared dish.
Open the can of cinnamon rolls, placing the frosting in the refrigerator. Cut each roll into 4 pieces. Place the pieces evenly over the apple pie filling.
Pour the heavy cream over the cinnamon roll pieces. Do not stir.
Bake for 40-45 minutes. If the top starts to brown too much, loosely cover the dish with aluminum foil to prevent further browning.
Once baked, drizzle the icing over the top.
Video
Notes
Canned pie filling can sometimes create extra moisture, so make sure the cinnamon rolls bake fully. Check the casserole at the 35-minute mark.
If the top is browning too quickly but the center is still doughy, loosely cover with foil to prevent over browning and extend the baking time by a few minutes. (This is what I did.)
Let the casserole cool slightly before serving to allow the pie filling and cinnamon rolls to set. This makes it easier to serve clean slices without too much liquid pooling.
Warming up the containers of icing for a few seconds in the microwave makes them easier to pour!