Preheat oven to 350°F. Grease a 9x13-inch baking dish with butter.
Prepare the stuffing mix according to package instructions using chicken broth for added flavor.
In a large bowl, mix together the cream of chicken soup, cream of mushroom soup, sour cream, and milk.
Add the shredded chicken to the mixture and stir until coated.
Spread half of the prepared stuffing into the baking dish.
Top with the chicken mixture, spreading evenly.
Cover with the remaining stuffing.
Bake uncovered for 30-35 minutes until bubbly and golden on top.
Let it rest a few minutes before serving—trust me, it’s worth the wait.