Hash Brown Casserole

2 lb frozen hash brown potatoes
3/4 cup butter
1 tsp salt
1/4 tsp pepper
1/4 cup chopped onion (optional)
1 can cream of chicken soup
1 cup sour cream
1 1/2 cup grated cheddar cheese
3/4 cup crushed cornflakes

Defrost potatoes and combine with 1/4 cup melted butter. Season with salt and pepper, adding other ingredients, except the corn flakes and 1/2 cup melted butter. Place in a greased 2 quart casserole. Top with cornflakes (crackers) that have been mixed with the remaining butter.
Bake 350 for 45 minutes.