Oven baked 3-ingredient chicken à la king casserole is the kind of practical mid-century supper that earned a permanent place in family recipe boxes: economical, comforting, and easy enough for a warm Sunday when nobody wanted to fuss in the kitchen. Built from cooked chicken, condensed soup, and canned vegetables, it bakes into a creamy, old-fashioned casserole with the familiar flavors of chicken à la king—tender meat, mushrooms, pimientos, and a rich sauce—without a long stovetop preparation.
This casserole is especially good with buttered toast points, baked biscuits, rice, or buttered egg noodles to catch the extra sauce. For a balanced plate, add a crisp green salad, simple steamed green beans, or sliced tomatoes, and if you want to lean into its vintage supper-club feel, serve it with canned peaches or a light fruit salad on the side.
Oven Baked 3-Ingredient Chicken à la King Casserole
Servings: 6
Ingredients
4 cups cooked chicken, cut into bite-size pieces
2 cans (10.5 ounces each) condensed cream of chicken soup
2 cans (4 ounces each) sliced mushrooms with pimientos, drained
Directions
1. Heat the oven to 350°F and lightly grease a 2-quart casserole dish.
2. In a large bowl, combine the cooked chicken, condensed cream of chicken soup, and drained mushrooms with pimientos. Stir until the chicken is evenly coated and the mixture looks creamy throughout.
3. Spoon the mixture into the prepared casserole dish and spread it into an even layer.
4. Bake uncovered for 30 to 35 minutes, until hot and bubbling around the edges and lightly golden on top.
5. Let the casserole rest for 5 minutes before serving so the sauce settles slightly, then spoon onto plates or into shallow bowls.
Variations & Tips
Add a topping: If you want a little texture, scatter buttered bread crumbs or crushed buttery crackers over the top before baking. It moves the casserole a little beyond the strict three-ingredient version, but the crisp finish is very good with the creamy filling.
Use leftover turkey: This recipe works beautifully with cooked turkey, which makes it especially handy after a holiday meal. The flavor stays true to the original style, and dark-and-white meat together give the casserole a fuller taste.
Adjust the consistency: If your chicken is very dry or the mixture seems too thick to spread easily, stir in 2 to 4 tablespoons of milk before baking. If using freshly cooked chicken that released some moisture, you likely will not need it.
Serve it over something: Classic chicken à la king is often served over toast, rice, biscuits, or noodles, and this baked version is no exception. If you want the casserole to stretch a bit farther, spoon smaller portions over one of those bases for a more complete meal.
Make-ahead tip: Assemble the casserole several hours ahead, cover, and refrigerate. When ready to bake, let it sit at room temperature for about 20 minutes first, then add a few extra minutes to the baking time so it heats through evenly.