Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine shredded chicken, cooked rice, and broccoli florets.
In another bowl, mix cream of chicken soup, milk, garlic powder, onion powder, salt, and pepper.
Pour the soup mixture over the chicken mixture and stir until well combined.
Spread the mixture evenly in a greased 9x13 inch baking dish.
Top with shredded cheddar cheese and sprinkle paprika over the top.
Cover the dish with aluminum foil and bake for 20 minutes.
Remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and golden.
Let it cool for a few minutes before serving.
Enjoy your delicious casserole!