Instructions

  1. In a medium saucepan, mix butter and cheese. Stir until the cheese melts.
  2. In a slow cooker, combine cheese/butter mixture and add the eggs, sour cream, soup, salt, milk, mustard and pepper and stir well.
  3. Add cooked and drained macaroni and stir again.
  4. Set the slow cooker on low and cook for 3 hours, stirring occasionally.