Preheat the oven to 350 degrees Fahrenheit and spray a 9X13 baking pan with a non-stick cooking spray.
In a large bowl, stir together 1 can whole kernel corn (15.25 ounces, drained), 1 can creamed style corn (14.75 ounces), 1 package corn muffin mix (8 ounces), 1 cup sour cream, and ½ cup melted butter until combined.
Pour the mixture evenly into the 9X13 baking dish.
Bake for 45 minutes.
Top the casserole with 1 cup shredded cheddar cheese. Bake for an additional 5-10 minutes until the cheese is melted and the top of the casserole has browned.
Remove from the oven, let the casserole sit for 5 minutes. Then the casserole is ready to serve and enjoy!
Video
Notes
Refrigerate the leftovers in an airtight container for up to 5 days.