Preheat oven to 350°F (175°C) and lightly grease a 9×13-inch baking dish.
In a large bowl, combine cooked rice, shredded chicken, cream of chicken soup, French onion soup, sour cream, garlic powder, onion powder, salt, and black pepper. Mix until evenly coated.
Stir in 1 cup of the shredded cheese and 1 cup of the French fried onions.
Transfer the mixture into the prepared baking dish and spread evenly.
Top with remaining cheese and bake uncovered for 25–30 minutes, until bubbly and golden.
Sprinkle with remaining French fried onions and bake for an additional 5 minutes.
Garnish with chopped parsley before serving.
Creamy, cheesy, and packed with savory French onion flavor—this chicken rice bake is pure comfort food bliss!