Potato Casserole

2 lb bag of hash brown potatoes
1/2 cup chopped onions
2 sticks butter, melted
salt & pepper
1 can cream of chicken soup
1 small carton sour cream
1 small jar cheese whiz
2 cups cornflakes (optional)

Put potatoes in baking pan to thaw. Add onion, salt, pepper, and 1/2 of melted butter. Mix soup, sour cream, and cheese whiz together and pour over potatoes. Crumble cornflakes and mix together with remaining butter and spread over potates. Bake at 350 for 1 hour or until potatoe are tender.