This is a cornbread recipe taken from a post on a private forum that I frequent. For my reference.

1 cup of flour
1 cup yellow corn grits
5 tsp baking powder
1 tsp salt
1/2 and 3/4 cup chopped onion
1/8 cup of diced garlic
Optional: Chopped ham; grated cheese; grated jalapeño cheese

In a bowl: 1 egg, 1 cup milk, 1/4 cup of corn oil

Mix dry ingredients together, beat the stuff in the bowl. Add the stuff in the bowl to the dry ingredients, stir. When it’s mixed up, put it in a #5 cast iron skillet (he says it’s about 5″ at the bottom and 6″ at the top) that has been sprayed with nonstick stuff. Put in oven, bake for about 25 minutes at 425°F.