Preheat oven: Set to 350°F (175°C). Grease a 9x13-inch casserole dish with cooking spray or butter.
Cook your rice: If not already cooked, prepare 2 cups of rice according to package directions. Fluff with a fork.
Mix the base: In a large mixing bowl, combine cream of chicken soup, cream of mushroom soup, sour cream, chicken broth, garlic powder, onion powder, salt, and pepper. Stir until smooth.
Add the goodies: Fold in cooked rice, shredded chicken, frozen vegetables (if using), and 1 cup of the shredded cheese. Stir until everything is coated in the creamy sauce.
Transfer to dish: Pour the mixture into your prepared casserole dish, spreading it evenly.
Add the topping: In a small bowl, combine crushed crackers with melted butter. Sprinkle evenly over the casserole.
Bake: Place uncovered in the oven for 25–30 minutes, until hot and bubbly.
Cheese finish: Remove from oven, sprinkle remaining ½ cup cheese over top, and return to oven for 5–10 more minutes—until cheese is melted and slightly golden.
Cool & serve: Let rest for 5 minutes before serving so it holds its shape.