Preheat oven to 350°F. Spray a 9x13-inch casserole dish with nonstick cooking spray, set aside.
Place the rolls in the dish, sides touching. The rolls will be crowded in the dish, but this is good.
Pour the cream around the cinnamon rolls, into the bottom of the dish, making sure cream is around each roll.
In a medium microwave-safe bowl melt 6 tablespoons butter. Remove from microwave and add 1/2 cup brown sugar and 2 teaspoons cinnamon. Stir until mixed well and smooth. Drizzle over the top of rolls. Cover with foil.
Bake in preheated oven for 30 to 38 minutes. Remove from oven and cool for 15 minutes.
While the rolls are baking, beat cream cheese, reserved frosting from cinnamon rolls cans, and powdered sugar until creamy. Set aside until ready to spread on rolls.
Top with cream cheese frosting and spread to coat. Serve warm.