Preheat oven to 400°F. Grease 9" round cake pan with magic cake release or butter.
Combine flour, cornmeal, sugar, baking powder and salt.
Separately mix egg, milk and oil.
Make a well in the center of the dry ingredients. Pour in the wet ingredients and stir until well combined. Do not overstir.
Bake 400°F for 20-25 minutes until cornbread is golden brown and wooden pick inserted near center comes out clean.
Cool in pan. Cut just before serving. Store leftovers loosely covered in foil at room temperature for 1-2 days.
Notes
Don't over-mix the batter or the cornbread will be tough.
Use a round pan or muffin tin. A square pan won't bake the cornbread evenly.
To make muffins: Line 12 muffin cups with liners (or use Magic Cake Release). Fill 2/3 to 3/4 full. Bake at 400°F for about 15 minutes until muffin tops are golden brown.