1Preheat oven to 400 degrees F (205 degrees C). Lightly grease an 8-inch square baking dish.
2Combine flour, cornmeal, sugar, baking powder, baking soda, and salt in a large bowl. Mix egg, sour cream, milk, and butter in a small bowl. Fold egg mixture into flour mixture until just moistened; pour into prepared baking dish.
3Bake in preheated oven until a toothpick inserted near the center comes out clean, 20 to 25 minutes. Serve warm.
Footnotes
Tip
Aluminum foil helps keep food moist, ensures it cooks evenly, keeps leftovers fresh, and makes clean-up easy.