Mix butter, eggs and sour cream in a large casserole. Add Jiffy corn muffin mix, kernel corn and creamed corn. Mix well. Bake uncovered for 45 minutes at 350°F.
Saute onions in butter. fold corn into beaten eggs. Add muffin mix to egg mixture. Add green ... pan. Spread sour cream over top. Sprinkle cheese on top. Bake 40 minutes at 375°F.