Pour the heavy cream evenly over the cinnamon rolls.
In a medium bowl, stir together the melted butter, brown sugar, and cinnamon until combined. Pour the mixture over the cinnamon rolls. Cover with foil.
Bake for 40 minutes, or until golden brown.
Let cool for 20 minutes. Warm the packaged icing in the microwave for 15 seconds, then drizzle over the rolls and serve.