Preheat oven to 400°F. Spray a 3-quart baking dish with cooking spray. If you use a 2-quart dish, the cornbread topping will be slightly thicker and may require a few extra minutes in the oven. In a large bowl, whisk together condensed soups and milk.
Stir in cooked chicken and cheese.
Pour chicken mixture into prepared baking dish.
In a separate bowl, whisk together corn muffin mix, cream style corn, sour cream, egg, and melted butter.
Spread cornbread batter evenly over the chicken mixture.
Bake, uncovered, for about 40-50 minutes, or until a toothpick inserted in the center of the topping comes out clean. Tent the casserole loosely with foil if the top starts to get too dark before it’s cooked through. Let stand for about 5-10 minutes, then serve!
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Notes
Use cooked chicken: Rotisserie chicken or leftovers make prep quick and easy. Dice or shred it so it mixes well with the sauce.
Choose the right dish: Either a 3-quart baking dish or a 2-quart baking dish will work. The cornbread layer will be thicker in a 2-quart dish, so the casserole will need a few extra minutes in the oven.
Don’t overmix the cornbread: Stir until just combined so it stays tender.
Test for doneness: A toothpick inserted in the center should come out clean (no wet batter). If the top starts to brown too quickly, loosely cover the dish with foil for the last 10-15 minutes of baking.