Creating the delicious Chicken & Stuffing Casserole can be seamless by following these clear steps:

1. Preheat your Oven: Start by preheating your oven to 350°F (175°C). This allows for even cooking.
2. Prepare the Chicken: If you haven’t already, cook and shred or dice the chicken. This dish is perfect for using leftover rotisserie chicken.
3. Mix the Base: In a large mixing bowl, combine the cream of chicken soup, sour cream, and chicken broth. Stir until well blended.
4. Add the Chicken: Fold the cooked chicken into the cream mixture, making sure it’s evenly coated.
5. Incorporate Vegetables: Add the diced celery and onions into the mix. These add flavor and a bit of crunch.
6. Season It Up: Sprinkle in the garlic powder, onion powder, and black pepper. Stir everything together until well combined.
7. Prepare the Stuffing: In a separate bowl, prepare the stuffing mix according to the package instructions. This usually involves adding hot water or broth and letting it sit for a few minutes.
8. Combine Stuffing and Chicken: Gently fold the prepared stuffing into the chicken mixture, being careful not to break down the stuffing too much.
9. Transfer to Baking Dish: Pour the entire mixture into a greased 9×13 inch baking dish. Spread it out evenly.
10. Bake: Place the dish in the preheated oven and bake for 35-40 minutes, or until heated through and slightly golden on top.
11. Cool and Serve: Remove the casserole from the oven and let it cool for 5-10 minutes. This helps set the dish for easier serving.