Arrange onion and garlic in the bottom of a 9×13-inch baking dish. Place butter in the center. Bake 12 minutes.
Meanwhile, mix together the paprika, thyme, rosemary, garlic powder, onion powder, and salt and pepper in a small bowl and rub into the chicken. Set aside.
Add rice to baking dish and stir to combine. Arrange chicken on top, then pour hot broth and water around the chicken.
Cover dish tightly with foil and bake for 30 minutes. Remove foil and spray chicken with olive oil cooking spray. Continue baking until chicken is cooked through and liquid has absorbed into rice, about 20 minutes.
Let rest for 5 minutes, then fluff rice with a fork and serve. Enjoy!