Preheat your oven to 425°F (220°C) and lightly grease a sheet pan.
In a large mixing bowl, combine the pancake mix, milk, eggs, and melted butter. Stir until well combined.
Pour the pancake batter onto the prepared sheet pan, spreading it out evenly with a spatula.
Add your favorite toppings to the pancake batter, distributing them evenly across the surface.
Place the sheet pan in the preheated oven and bake for 12-15 minutes, or until the pancakes are golden brown and cooked through.
Remove from the oven and let cool slightly before slicing into squares or rectangles. Serve warm with maple syrup or your favorite pancake toppings.