1/2 cup butter
2/3 cup white sugar
2 eggs
1 cup buttermilk
1/2 teaspoon baking soda
1 cup cornmeal
1 cup all-purpose flour
1/2 teaspoon salt
1.Preheat oven to 375 degrees F (175 degrees C). Pour about a half-teaspoon of oil into a 10-1/2" cast-iron skillet and put it into the oven while it is preheating.
2.Melt butter in another large (12-inch) skillet. Remove from heat and stir in sugar. Quickly add eggs and beat until well blended. Combine buttermilk with baking soda and stir into mixture in pan. Stir in cornmeal, flour, and salt until well blended and few lumps remain. Pour batter into the prepared cast-iron skillet.
3.Bake in the preheated oven for 15-25 minutes, or until a toothpick inserted in the center comes out clean.