Since this is a cake like brownie using metal pan isn’t quite as important as when baking a fudge brownie. Metal pans are typically the best choice for brownies. They heat up quickly and distribute heat evenly, leading to brownies with a perfectly cooked interior. A glass pan heats up slower and retains heat longer, which can sometimes cause the brownies to cook more slowly and leave the edges overcooked while the center stays underdone. A ceramic pan was used in the images & testing at 350 degrees F and works fine for this recipe.