Baker Edward Espe Brown writes, "Discovered quite by accident; one batter makes three layers. The corn meal settles. The bran rises. In the middle an egg-custardy layer. Easy! Glorious! Amazing!"
Maybe a bit of hyperbole.
Combine wet ingredients. Stir in dry ingredients. It will be very watery. Pour into a greased 8 x 11" Pyrex pan. Bake at 350 degrees for 40+ minutes or until it rises and top looks set.