In a medium mixing bowl stir together flour, cornmeal, sugar, baking powder, and salt.
In a small mixing bowl beat egg whites, milk, oil, and green chilies, if desired. Stir into dry ingredients just until mixed.
Spray a 9x9x2-inch baking pan with nonstick spray coating. Pour batter into pan. Bake in a 400 degree F. oven for 20 to 25 minutes or until a toothpick inserted near the center comes out clean. Makes 12 servings.