
Saute onions in melted butter for 10 minutes in large kettle. Add flour to onions and butter and cook for four to five minutes, stirring until flour is absorbed.
In a separate container, combine water, chicken bouillon, potato flakes, and seasonings. Stir until thoroughly mixed and no lumps remain. Add to onion mixture, one pint at a time.
Add milk and cream, stirring until smooth and lightly thickened. Reduce heat and simmer for 15 minutes.
Cut pre-baked potatoes into chunks
Combine the potatoes with the soup to complete.