Preheat oven to 375°

Grease an 8 inch square pan

Melt butter in large 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 the batter into the prepared pan. Bake in the oven for 30-40 minutes, or until a toothpick inserted in the center comes out clean.