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.