01 - Set oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish.
02 - Open cans of cinnamon rolls and slice each roll into quarters. Reserve icing for later use.
03 - Arrange cut cinnamon roll pieces evenly in the prepared baking dish.
04 - Whisk eggs, heavy cream, vanilla extract, ground cinnamon, and granulated sugar in a medium bowl until fully combined.
05 - Pour custard mixture evenly over the arranged cinnamon roll pieces. Drizzle melted butter on top.
06 - Place dish in preheated oven and bake for 35–40 minutes, or until golden and set in the center.
07 - Remove casserole from oven. Drizzle maple syrup and reserved icing over the top while still warm.
08 - Allow to cool slightly before cutting into portions and serving warm.