Preheat oven to 350
Grease a 9x13 baking dish and set aside.
In medium-sized mixing bowl combine melted butter, sour cream, cream of chicken, onion, salt and pepper and stir to combine.
1 10 oz. can condensed cream of chicken soup, 1 cup sour cream, ½ cup butter, 1 medium onion, Salt and pepper
Add in thawed hash browns and cheddar cheese and mix to combine.
1 package, 2 cups cheddar cheese
Pour mixture into prepared baking dish.
In small mixing bowl, combine ¼ cup melted butter and corn flakes. Mix to cover corn flakes with butter. Spread cornflakes on top of casserole.
¼ cup butter, 2 cups cornflakes
Bake at 350 for 45 minutes or until bubbly.