Preheat the Oven and Melt Butter: Preheat your oven to 350°F (175°C). Place the butter in a 9x13 inch baking pan (23x33 cm) and place the pan in the preheating oven until the butter is completely melted. Carefully remove the pan from the oven.

Create the Caramelized Base: Pour the maple syrup evenly over the melted butter in the pan. Sprinkle the brown sugar evenly over the maple syrup. Do not stir.

Prepare the Pancake Batter: In a separate bowl, prepare the pancake batter according to the package directions of your chosen pancake mix. If the mix requires liquid, add the recommended amount of milk or water until you achieve a smooth, pourable batter. Avoid overmixing.

Pour Batter Over Syrup: Gently pour the prepared pancake batter evenly over the layer of melted butter, maple syrup, and brown sugar in the baking pan.

Bake the Pancakes: Bake in the preheated oven for 15-20 minutes, or until the top of the pancake layer appears lightly golden brown and a toothpick inserted into the center comes out clean.

Invert and Serve: Once baked, carefully remove the pan from the oven. Let it cool for a few minutes to help the caramelized layer set slightly. Place a large serving platter upside down over the baking pan. Invert the pan quickly and carefully to release the baked pancake onto the platter. Serve immediately.