Preheat oven to 375° F. Spray oil a 9x13 glass baking dish.
In a medium mixing bowl, whisk together buttermilk, butter and eggs.
In a large mixing bowl, whisk flour, cornmeal, baking powder, sugar, and salt.
Gradually add buttermilk mixture to flour mixture, stirring to combine.
Add batter to prepared baking dish and place in preheated oven. Bake for 30 minutes, or until top of bread is golden brown and toothpick inserted in center comes out clean.
Allow to cool for 10 minutes before serving.