Preheat your oven to 350°F (175°C).
In a mixing bowl, combine the shredded chicken, uncooked rice, cream of chicken soup, chicken broth, sour cream, garlic powder, onion powder, salt, and pepper until well mixed.
Transfer the mixture into a greased baking dish, spreading it evenly.
In a separate bowl, mix the crushed Ritz crackers with the melted butter until combined.
Evenly sprinkle the cracker mixture over the chicken and rice in the baking dish.
Bake in the preheated oven for 30-35 minutes or until the rice is tender and the topping is golden brown.
Allow the casserole to cool for 5 minutes before serving.