There are some dishes that seem to carry a whole family history right along with the supper plate, and this oven baked 4-ingredient chicken French onion is one of them. It has the same kind of practical goodness my great-aunts favored in Ohio farm kitchens: a handful of pantry ingredients, a warm oven, and a casserole dish that comes to the table bubbling and fragrant. The rich onion flavor, tender chicken, and blanket of melted cheese make it feel a little special, but it’s still simple enough for a weeknight when you want something hearty without a lot of fuss.
This chicken is mighty fine with mashed potatoes, buttered egg noodles, or fluffy white rice to catch every bit of the savory oniony sauce. For vegetables, I like green beans, roasted carrots, or a simple side salad with a sharp vinaigrette to balance the richness. If you’re taking it to a potluck, set it beside dinner rolls or biscuits and let folks spoon that sauce right over the top.
Oven Baked 4-Ingredient Chicken French Onion
Servings: 6
Ingredients
2 pounds boneless, skinless chicken breasts or thighs, cut into large pieces
1 packet dry French onion soup mix
1 cup sour cream
2 cups shredded mozzarella or Swiss cheese
Directions
1. Preheat your oven to 375°F and lightly grease a 9x13-inch glass baking dish. Spread the chicken pieces in an even layer so they cook evenly.
2. In a medium bowl, stir together the dry French onion soup mix and sour cream until well combined. Spoon the mixture over the chicken and spread it gently so all the pieces are coated.
3. Cover the dish with foil and bake for 30 minutes. Remove the foil, sprinkle the shredded cheese evenly over the top, and return the dish to the oven for 10 to 15 minutes more, until the chicken is cooked through and the cheese is melted and lightly golden.
4. Let the casserole rest for 5 minutes before serving so the sauce settles a bit. Spoon it onto plates and serve hot.
Variations & Tips
Use chicken thighs: If you like especially juicy baked chicken, boneless skinless thighs are a wonderful choice here. They stay tender and forgiving, which is helpful if supper gets delayed a few minutes.
Try Swiss for deeper flavor: Swiss cheese gives this dish more of that old-fashioned French onion taste, while mozzarella makes it mild and extra stretchy. A half-and-half blend is mighty good too.
Add crispy onions on top: If you want the look and crunch of a church-supper casserole, scatter a handful of crispy fried onion strings over the top right before serving. They add a lovely little bite and make the dish feel dressed up.
Make it a full meal: You can nestle cooked rice or egg noodles onto the plate before spooning the chicken over top, and all that creamy onion sauce will soak in beautifully. If the sauce seems too thick after baking, stir in a spoonful or two of warm broth before serving.