Step 1: Preheat the Oven

Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch baking dish with butter or cooking spray to prevent sticking.

Step 2: Prepare the Chicken Mixture

In a large mixing bowl, combine the shredded chicken, cream of chicken soup, cream of mushroom soup, sour cream, milk, onion powder, garlic powder, thyme, salt, and pepper. Stir until all the ingredients are well incorporated into a creamy mixture.

Step 3: Layer the Chicken Mixture

Spread the chicken mixture evenly into the greased baking dish, creating a smooth, even layer.

Step 4: Prepare the Stuffing

In a separate bowl, mix the stuffing mix with melted butter and chicken broth. Stir well to moisten the stuffing, allowing it to absorb the broth and butter fully.

Step 5: Assemble the Casserole

Evenly spread the prepared stuffing mixture over the chicken layer. If using shredded cheese, sprinkle it on top for an extra cheesy touch.

Step 6: Bake the Casserole

Place the casserole dish in the preheated oven and bake uncovered for 35-40 minutes, or until the top is golden brown and the casserole is bubbling around the edges.

Step 7: Let It Rest

Remove the casserole from the oven and let it sit for 5-10 minutes before serving. This allows the flavors to meld together and makes it easier to serve.