Preheat the oven to 350 degrees. Prepare an eight-inch cake or pie pan by spraying it with cooking spray.
Pop open the tube of cinnamon rolls. Set aside the frosting, and start by placing one cinnamon roll in the center of your prepared pan. Unroll the next cinnamon roll and create one, giant cinnamon roll shape by wrapping it around the roll in the middle. Continue until all of the rolls are used.
In a bowl, mix the butter, flour, brown sugar and cinnamon until the mixture is well-combined and crumbly.
Sprinkle the crumbs evenly over the top of the cinnamon rolls, and bake for 25 minutes or until the topping is lightly browned.
Drizzle or pour the frosting over the top of the cake, and serve immediately. Store any leftovers in an airtight container.