Grease a 2-quart casserole dish.
In a large bowl stir together corn, cream-style corn, corn muffin mix, sour cream, and melted butter. Stir in cheese. Pour into casserole dish.
Bake, uncovered, 1 hour and 10 minutes, or until set in middle and toothpick inserted in center comes out clean.
Let stand 5 minutes before serving.
