Grease a 9-inch round cake pan or cast iron skillet well and set aside. Preheat the oven to 400 degrees. In a medium mixing bowl, add the flour, cornmeal, sugar, salt, and baking powder. Whisk to combine well. Make a well in the center of your dry ingredients and add your oil or butter, milk, and egg. Stir just until the mixture comes together and there are only a few lumps remaining. Pour the batter into the prepared pan and bake for 20-25 minutes until the top is a deep golden brown and a toothpick inserted into the center comes out clean. Serve hot.