In a large mixing bowl, combine the cooked chicken, cream of chicken soup, sour cream, and broth. Stir until the mixture achieves a smooth and creamy consistency.

Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish with butter or cooking spray. Spread the creamy chicken mixture evenly across the bottom of the prepared dish.

Gently layer the stuffing mix on top, distributing it evenly to create a satisfying texture contrast in your casserole.

Melt a few tablespoons of butter in the microwave, then drizzle it over the top of the stuffing layer. This will help achieve a beautifully crispy finish.

Place the casserole in the preheated oven and bake uncovered for 35 to 40 minutes until the top is golden brown and the filling is bubbling.

Check for doneness by inserting a knife into the center; it should feel firm and steam should escape. Your casserole is ready to be served!