- Preheat oven to 400°F and grease a large cast iron skillet with butter. Whisk corn muffin mix, sour cream, corn, egg and 2 tablespoons melted butter together in medium bowl until smooth. Pour into prepared skillet and bake until golden brown, about 15 minutes.
- Top with a layer of chicken, barbecue sauce and cheese. Bake until cheese is melted and chicken is fully heated through, about 5 to 8 minutes.
- Top with onion and cilantro. Serve with sour cream and enjoy.
Tip: Packaged chopped red onions can usually be found in the produce aisle of your local grocer.