Instructions

  1. Fry bacon until crisp and drain well on paper towels.
  2. Discard all but 1T bacon grease; saute onions in bacon grease and drain well Slice potatoes thinly.
  3. Butter a 13x9 casserole dish; layer potatoes, bacon, onion mixture and finish with more potatoes.
  4. Mix sour cream, cheese, and mushroom soup; pour mixture over top of potatoes.
  5. Cover with foil; bake at 350 degrees for 1 to 1 1/2 hours; uncover for the last 20 minutes.