Helen's Cheesy Potatoes

2 lbs. frozen hash browns
1 can cream of mushroom soup or cream of chicken soup
2+ cups cheddar cheese
1/2 cup melted butter
1 pint sour cream
1/2 cup chopped onion
2 cups Rice Krispies or Corn Flakes
1/4 to 1/2 cup melted butter

Mix first 6 ingredients.  Pour into 9x13 pan.  Mix Rice Krispies and butter.  Put on top of potato mixture.  Bake covered with aluminum foil for 30 minutes at 350 degrees.  Uncover and bake another 20 minutes.
Helen's notes - "I always use extra cheese and Rice Krispies and butter.  Sometimes I just put cheese on top instead of Rice Krispies.  Usually I bake uncovered the whole time."