Preheat oven to 425°F. Line a half-size baking sheet (18"x13") with parchment paper. Spray parchment paper and inside rims of the baking sheet with nonstick cooking spray, or brush with additional melted butter. Set aside.
In a large mixing bowl, add the wet ingredients and whisk to combine.
Add in the dry ingredients and mix with a spatula
Stir until you no longer see flour streaks, but don't worry about getting all the little lumps out.
Spread the batter into an even layer and top with any toppings you like
Bake for 13-15 minutes, until golden brown and set in the center.
Remove pancake from oven and brush with 2 tbsp of butter.Return to the oven to bake or broil for another minute or two.