Preheat the oven to 350°F. Lightly grease a 9×13-inch baking dish.
Place the whole kernel corn, cream-style corn, corn muffin mix, sour cream, melted butter, eggs, salt, and black pepper in a large mixing bowl. Stir until evenly combined.
Fold in ½ cup of the shredded cheddar cheese.
Spread the mixture evenly in the prepared baking dish.
Bake for 35 minutes.
Sprinkle the remaining ½ cup of cheddar cheese over the casserole.
Bake for another 10 to 15 minutes, until the center is set and the edges are lightly golden.
Let the casserole rest for 5 to 10 minutes before serving.
Notes
Tips and Tricks
Drain the Corn Well - Excess liquid from the whole kernel corn can make the casserole too wet.Check the Center - The middle should be set rather than visibly liquid. A slight softness is normal, but the casserole shouldn't slosh when the dish is gently moved.Watch the Cheese - If the topping starts browning too quickly, loosely cover the baking dish with aluminum foil for the remaining baking time.Use Freshly Shredded Cheese - Cheese shredded from a block generally melts more smoothly than packaged shredded cheese.Make It Ahead - Mix the canned corn, corn muffin mix, sour cream, butter, eggs, and seasonings up to one day ahead. Refrigerate covered, then stir in the first ½ cup of cheese just before baking. Allow additional baking time if the mixture is cold.Adjust for a Smaller Baking Dish - A smaller, deeper dish will produce a thicker casserole and require a longer baking time. Check that the center is completely set before removing it from the oven.
Storing and Reheating
Refrigerator - Store cooled leftovers in an airtight container in the refrigerator for up to 4 days.Freezer - Freeze individual portions in freezer-safe containers for up to 2 months. Thaw overnight in the refrigerator before reheating. The texture may be slightly softer after freezing.Oven - Place leftovers in an oven-safe dish, cover with foil, and reheat at 325°F until heated through.Microwave - Heat individual servings in a microwave-safe dish in 30-second intervals until hot.