Preheat oven to 450°. Coat bottom and sides of an 8-inch cast-iron skillet with vegetable oil; heat in oven 5 minutes. Whisk together buttermilk, egg, cheese, and cornmeal. Pour into hot skillet. Bake 25 minutes.
Cheesy Cornbread Muffins
Omit vegetable oil. Prepare recipe as directed, spooning batter into a lightly greased 12-cup muffin pan, filling three-fourths full. Decrease bake time to 15 to 17 minutes or until tops are golden brown.