01 - Preheat the oven to 350°F. Grease a 9x13-inch baking dish to prevent sticking.
02 - Open the cinnamon rolls and reserve the icing. Cut each roll into quarters and distribute evenly in the prepared baking dish.
03 - In a large bowl, whisk together eggs, whole milk, heavy cream, granulated sugar, vanilla extract, ground cinnamon, and salt until fully combined and smooth.
04 - Pour the custard mixture evenly over the cinnamon roll pieces in the baking dish.
05 - In a small bowl, blend melted butter, brown sugar, and ground cinnamon, then drizzle this mixture evenly over the casserole.
06 - Bake for 30 to 35 minutes until the casserole’s center is set and the surface turns golden brown.
07 - Let cool for 10 minutes. Warm the reserved icing briefly in the microwave and drizzle over the casserole before serving.