1. Preheat the oven to 375°F (190°C) to ensure even cooking and a golden finish.
2. Grease an 8×8 inch or 9×13 inch baking dish with melted butter to prevent sticking and enhance flavor.
3. Cut the refrigerated cinnamon rolls into bite-sized pieces, approximately 6-8 pieces per roll.
4. Spread the cut cinnamon roll pieces evenly in the prepared baking dish.
5. In a mixing bowl, whisk together eggs, milk, ground cinnamon, and vanilla extract until fully combined.
6. Pour the whisked egg mixture evenly over the cinnamon roll pieces, ensuring full coverage.
7. Lightly press down the cinnamon roll pieces with a spatula so they absorb the egg mixture.
8. Drizzle maple syrup evenly over the top for an additional layer of sweetness and flavor.
9. Place the baking dish in the preheated oven and bake for 20-35 minutes, or until the top is golden brown and the custard is set.
10. Remove the baking dish from the oven and let it cool slightly before serving.
11. Serve warm and enhance with optional toppings such as cream cheese icing, fresh fruit, whipped cream, or a drizzle of syrup.