Preheat the Oven: Set your oven to 350°F (175°C) and grease a 9x13-inch baking dish with butter.
Prepare the Base: In a large mixing bowl, combine uncooked rice, chicken broth, and milk. Stir well.
Mix the Filling: Add shredded chicken, cream of chicken soup, cream of mushroom soup, sour cream, garlic powder, onion powder, salt, pepper, and paprika. Mix until evenly combined.
Transfer to Baking Dish: Pour the mixture into the prepared baking dish, spreading it evenly.
Add Cheese (Optional): If using, sprinkle shredded cheddar cheese over the top for extra creaminess.
Bake the Casserole: Cover with foil and bake for 45 minutes.
Prepare the Topping: While baking, mix crushed butter crackers with melted butter.
Add Crispy Topping: After 45 minutes, remove the foil and sprinkle Parmesan cheese and buttered crackers over the casserole.
Finish Baking: Bake uncovered for an additional 15 minutes until golden brown and bubbling.
Cool and Serve: Let it rest for 5 minutes before serving. Enjoy warm!