Melt butter in microwave-safe dish and then spread into baking dish.
Pop the cinnamon roll packaging tubes and remove cinnamon rolls and icing. Set icing aside.
Cut cinnamon rolls into quarters using a small knife and cutting board. Add cut cinnamon rolls to the baking dish in an even layer.
In a medium mixing bowl, combine eggs, milk, vanilla and cinnamon and beat until well combined.
Pour egg mixture over the cinnamon roll layer in the baking dish
Add maple syrup over the top of the egg/cinnamon roll mixture.
Bake for 35-40 minutes or until the center is set.
Drizzle the cinnamon roll icing over the top of the cooked breakfast casserole. Slice cinnamon french toast breakfast bake and serve warm.
You can easily make this ahead of time. Follow steps and when it gets to the baking step, simply cover the casserole and store in the refrigerator up to 1 day. Remove from refrigerator and bake as normal.