1Heat oven to 400ºF. Spray 13x9-inch (3-quart) glass baking dish with cooking spray.
2In large bowl, mix chicken, poultry seasoning, garlic powder, sour cream and milk. Season well with salt and pepper. Fold in cheese and green onions. Spoon mixture evenly into dish.
3Make cornbread mix as directed on pouch, substituting cream style corn for the milk and adding the egg and melted butter. Spread evenly over chicken mixture.
4Bake about 30 minutes or until toothpick inserted in center of topping comes out clean.