I posted my southern "Johnny Reb Cornbread" already. Yankee cornbread has sugar and is more cakelike and as I said it has a place on the table too. I often add other ingredients to Yankee cornbread but would NEVER add even a grain of sugar to my Johnny Reb cornbread for fear of my ancestors haunting me with bad dreams of cornbread, corn dodgers and hoecakes hurled at my head. But again each has its place on the table be it North or South, it still satisfies the mouth.
Stir together dry ingredients. Then add egg, oil, and enough milk to make a batter a bit thinner than brownie batter but thicker than cake batter. Pour this into greased 9x9 inch pan. Bake in a pre-heated 400 degree oven about 20-30 minutes till done and lightly browned on top.
Notes: Now should you desire to add the additives you just put them in with the exception of sour cream, if adding sour cream, you add ½ teaspoon baking soda and add the sour cream before the milk.
I like to omit the sugar then put in a bit of sour cream, chopped jalapenos, a handful of whole kernel corn, a handful of shredded mexican cheese, and a bit of chopped cilantro for a nice Mexican cornbread.