To cook them on a sheet pan, preheat the oven to 400 F and add the batter to a parchment lined or silicone mat on a baking sheet or 1/2 size baking sheet. Gently spread out the batter (it's ok if the batter does not fill up the entire sheet!) Add your toppings (you can always do different types of topping in sections for more variety.) Bake for 12-14 minutes or until lightly golden brown with the center cooked through. Cut into squares and serve.