Heat the oven to 400 degrees. Spray the bottom and sides of an 8-inch square pan or 9-inch round cake pan with the cooking spray.
In a 1 quart saucepan, heat the butter over low heat until melted.
In a large bowl, beat the melted butter, milk and egg with a fork or wire whisk until well mixed. Add the cornmeal, flour, sugar, baking powder and salt all at once; stir just until the flour is moistened (batter will be lumpy). Pour batter into the pan; use a rubber spatula to scrape batter from bowl. Spread batter evenly in pan and smooth top of batter.
Bake in preheated oven for 20 to 25 minutes or until golden brown and a toothpick inserted in the center comes out clean. Serve warm. Makes 12 servings. Enjoy!