This Oven-Baked 4-Ingredient Chicken Royale is the kind of comforting, church-basement classic that shows up on every potluck table and always disappears first. My aunt clipped a version of it from a 1967 magazine and made it for every church dinner, funeral lunch, and family get-together until the day she passed. Creamy chicken casserole fresh from the oven in a white baking dish Creamy chicken casserole fresh from the oven in a white baking dish It’s simple pantry ingredients, barely any prep, and you end up with tender chicken breasts smothered in a creamy golden mushroom sauce and topped with crispy onions. It feels a little fancy but is easy enough for a busy weeknight. Serve this Chicken Royale straight from the white casserole dish with a big spoon, so everyone can scoop up plenty of sauce. It’s wonderful over fluffy white rice, buttered egg noodles, or mashed potatoes to soak up all that creamy golden mushroom gravy. Add a simple green side—steamed broccoli, green beans, or a tossed salad—to balance the richness. At potlucks, I like to park it next to a basket of warm dinner rolls so folks can mop up every last bit from their plates. Plated serving of chicken royale with rice and green beans Plated serving of chicken royale with rice and green beans Oven-Baked 4-Ingredient Chicken Royale Servings: 6 Ingredients 2 pounds boneless, skinless chicken breasts (about 4–6 pieces, trimmed) 1 (10.5-ounce) can condensed golden mushroom soup 1 cup sour cream (full-fat or light) 1 (6-ounce) can or package crispy fried onions (French-fried style), divided Four simple ingredients arranged on a kitchen counter Four simple ingredients arranged on a kitchen counter Directions Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch white ceramic or glass casserole dish with cooking spray or a thin swipe of oil. Pat the chicken breasts dry with paper towels and trim any excess fat. If they are very thick, slice them in half horizontally so they bake evenly and stay tender. Lay the chicken breasts in a single layer in the prepared casserole dish, fitting them snugly but without overlapping too much. Raw chicken arranged in a white casserole dish before baking Raw chicken arranged in a white casserole dish before baking In a medium bowl, stir together the condensed golden mushroom soup and sour cream until completely smooth and blended. This is your creamy sauce base. Sprinkle about half of the crispy fried onions evenly over the chicken in the casserole dish. This gives a flavorful layer that softens slightly under the sauce. Pour the soup and sour cream mixture over the chicken and onions, spreading with a spoon or spatula so every piece of chicken is well coated and the sauce reaches the edges of the dish. Creamy sauce being spread over chicken in the casserole dish Creamy sauce being spread over chicken in the casserole dish Cover the casserole tightly with foil and bake in the preheated oven for 30 minutes, until the sauce is bubbling and the chicken is starting to turn opaque. Carefully remove the foil, then sprinkle the remaining crispy fried onions evenly over the top of the saucy chicken to form a crunchy topping. Return the uncovered casserole to the oven and bake for another 15–20 minutes, or until the chicken is cooked through (an instant-read thermometer should read 165°F in the thickest part) and the onions on top are golden and crisp. Crispy fried onions being added to the bubbling casserole Crispy fried onions being added to the bubbling casserole Let the casserole rest for 5–10 minutes before serving so the sauce can thicken slightly. Use a large serving spoon to lift portions, making sure to scoop from the bottom so each serving has chicken, creamy golden mushroom sauce, and plenty of crispy onion topping. Variations & Tips For picky eaters, you can slice the chicken into bite-size pieces before baking so it feels more like a creamy casserole than whole chicken breasts—kids often like it better this way. If someone in your family doesn’t care for the texture of crispy onions, you can stir all of them into the sauce instead of putting them on top, or reserve a corner of the dish without the onion topping. Kid-friendly bowl of chicken royale with bite-size pieces Kid-friendly bowl of chicken royale with bite-size pieces To stretch the meal for a crowd, tuck 2–3 cups of par-cooked egg noodles or steamed rice around the chicken before adding the sauce, then bake as directed, making sure everything is coated; just check that the chicken still reaches 165°F. For a slightly lighter version, use light sour cream and reduced-fat condensed soup, but avoid fat-free sour cream, which can curdle when baked. You can also swap in boneless, skinless chicken thighs; they stay very moist and are more forgiving if slightly overbaked. If you want a bit of extra color and flavor, add a small handful of grated Parmesan to the top along with the fried onions, understanding that this technically adds a fifth ingredient beyond the classic version. Chicken royale variation with noodles baked into the casserole Chicken royale variation with noodles baked into the casserole Food safety tips: Always keep raw chicken refrigerated until you’re ready to cook, and wash your hands, cutting board, and any utensils that touch the raw poultry with hot, soapy water before using them for other ingredients. Use an instant-read thermometer to confirm the chicken reaches 165°F in the thickest part. Do not leave the finished casserole at room temperature for more than 2 hours; refrigerate leftovers promptly in shallow containers, and reheat thoroughly until steaming hot before serving again.