Preheat oven to 350 degrees F.
Spray a 9x13" baking dish with cooking spray.
Place the cinnamon rolls in the baking dish and then pour the whipping cream around them.
In a saucepan, melt the butter and brown sugar.
Once melted, stir in the additional 3 tbsp of heavy cream and stir until smooth.
Pour this mixture over the cinnamon rolls.
Bake in the preheated oven for 25-30 minutes. The tops should be golden and most of the liquid should be soaked up. If all of the liquid isn't soaked up, that's normal - just spoon it over the cinnamon rolls after you serve them - it's SO good!
Use the frosting provided in the cinnamon rolls to frost the cinnamon rolls.
Serve and drizzle with additional liquid from the pan. Enjoy!
