Preheat the oven to 350 degrees.
Cut chicken into bite-sized pieces and season with salt, pepper, garlic powder, and onion powder.
2 boneless skinless chicken breasts, Salt/Pepper, ½ teaspoon garlic powder, ½ teaspoon onion powder
Heat butter in a large pot over medium heat until melted. Add the chicken and cook until golden brown on all sides, about 5 minutes. Remove and set aside. Note: This step is not needed if using a cooked rotisserie chicken.
2 Tablespoons butter
Add the chicken broth, olive oil, and rice to the pot and bring to a boil, then reduce heat to a simmer.
2 1/2 cups chicken broth, 1 Tablespoon olive oil, 1 1/4 cups white long grain rice
Cover tightly and cook for 7 minutes.
Add the broccoli to the rice and turn off the heat. Cover and let stand for 10 minutes, do not stir.
1 (16 ounce) bag frozen broccoli florets
Add the cooked chicken, soup, milk, sour cream, and half of the cheddar cheese. Stir only to combine.
1 (10.5 ounce) can Condensed Cream of Chicken Soup, ½ cup milk, ½ cup sour cream, 2 cups shredded cheddar cheese
Add to a lightly greased 9 x 13 casserole dish and top with remaining cheese.
Cover and bake for 15 minutes.
Melt the butter and crumble up the crackers. Combine to form the topping for the casserole.
1 cup Ritz crackers, 2 tablespoons melted butter
Top the casserole with the crumbled cracker topping and bake uncovered for 10 additional minutes.
Let the casserole sit for 5 minutes prior to serving.