Preheat the Oven:
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
Prepare the Stuffing Mix:
In a bowl, combine the stuffing mix with chicken broth and melted butter. Stir until moistened and set aside.
Make the Creamy Base:
In another bowl, whisk together cream of chicken soup, sour cream, and milk until smooth.
Assemble the Casserole:
Spread the shredded chicken evenly across the bottom of the prepared baking dish.
Pour the creamy mixture over the chicken, spreading it out with a spoon.
Top with the prepared stuffing, spreading it evenly across the casserole.
Bake:
Cover the dish with foil and bake for 20 minutes.
Remove the foil and bake for an additional 10-15 minutes, or until the stuffing is golden and the casserole is bubbling.
Garnish and Serve:
Let the casserole cool for a few minutes before serving. Garnish with fresh parsley or Parmesan cheese, if desired.