baked potato soup

4 large baked potatoes
2/3 c. butter
2/3 c. flour
6 c. milk, whole or 2%
3/4 tsp. salt
1/2 tsp. pepper
1 small onion, chopped
12 slices bacon, cut into pieces
2 c. shredded cheddar cheese
1 c. sour cream

cook bacon in large pot.  add onions and fry until bacon is done.  remove from pot and set aside.  melt butter in pot, add flour.  stir in milk and cook until smooth and thickened, stirring constantly.  add potato pulp, salt, pepper, bacon, onions and cheese.  cook until heated.  stir in sour cream.