Saute chopped onion in melted butter in a large skillet until onion is tender set aside
Combine cornmeal and sugar in a large bowl add sauteed onion 12 cup of cheese beaten eggs milk oil sour cream corn and hot sauce Stir until ingredients are moistened
Spoon mixture into a greased 10-inch cast-iron skillet
Bake at 400 for 20 minutes Sprinkle cornbread evenly with remaining Cheddar cheese and bake an additional 5 minutes