I got this recipe off a TLC show (I don't remember which one). In our house, we start this recipe by making butter, so that we have butter to put on the cornbread & buttermilk to use in the recipe.
2 c buttermilk
1 c cornmeal
1 c flour (ideally whole wheat)
1 T baking powder
2 T butter
Melt butter in cast iron skillet (or other oven safe skillet). Mix all ingredients together. Pour into skillet. Bake 1/2 hr at 425.