For a quicker version, you can substitute all of the dry cornbread ingredients (cornmeal, flour, sugar, salt, baking powder and baking soda) for a cornbread mix. I like the Bob's RedMill Stoneground Cornbread Mix. You would still add the milk/vinegar mixture, oil and creamed corn, and top with the sautéed onions, sour cream and cheese. Bake as directed.