Creating the Million Dollar Chicken Casserole is straightforward if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Combine Ingredients: In a large mixing bowl, combine the cooked, shredded chicken, cream of chicken soup, sour cream, cheddar cheese, milk, garlic powder, onion powder, and salt and pepper. Mix until well combined.
3. Prepare Casserole Dish: Spread the chicken mixture evenly in a greased 9×13-inch casserole dish.
4. Prepare Topping: In a separate bowl, combine the crushed Ritz crackers with melted butter. Stir until the crackers are fully coated.
5. Add Topping: Sprinkle the crushed cracker mixture evenly over the chicken mixture in the casserole dish.
6. Bake: Place the casserole in the preheated oven and bake for about 30 minutes or until the topping is golden brown and the casserole is hot and bubbly.
7. Garnish: Once cooked, remove from the oven and let it cool for a few minutes. If desired, garnish with fresh parsley for added color.
8. Serve: Your Million Dollar Chicken Casserole is ready to be served!