Preheat the oven to 350°F.
In a large saute pan over medium heat, cook celery and onion in butter until tender, about 5 minutes. Add chicken broth and apple cider; continue cooking for 2 minutes.
In a large bowl, combine the stuffing mix, apples, walnuts and vegetable chicken broth mixture, and mix well.
Place stuffing in a greased baking dish, and bake on middle rack of preheated 350°F oven for 45 minutes until internal temperature reaches 165°F.
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