Preheat your oven to 350º F. This initial step is essential for ensuring your casserole cooks evenly and achieves that perfect golden top.
Prepare the Rice-A-Roni according to the package directions. This will typically involve boiling water, adding the rice, and letting it simmer until tender. The flavor base of the rice adds a delightful taste to the entire casserole.
In a large bowl, stir together the cream of chicken soup, sour cream, cream cheese, Italian dressing mix, and butter until well combined. This mixture is the heart of the casserole, creating a rich, creamy sauce that coats all the ingredients.
Add in the shredded chicken and the cooked rice, mixing everything gently to ensure that the chicken and rice are evenly coated with the creamy sauce.
Season the mixture with salt and black pepper to taste. This step is crucial, as it enhances the overall flavor of the dish. Taste and adjust as needed.
Spread the rice mixture into a lightly sprayed 9×13 pan. Make sure it’s evenly distributed to ensure even cooking.
Top the rice mixture with the remaining shredded cheese. This will create a beautifully melted layer of cheese on top that adds both flavor and texture.
Bake uncovered for 30 minutes. Watch as the cheese bubbles and the edges turn a lovely golden brown. The aroma will fill your kitchen with warmth and anticipation.
Once done, remove from the oven and let cool for a few minutes before serving. This allows the casserole to set a little, making it easier to serve.