This oven baked 3-ingredient chicken lombardy is the kind of no-fuss casserole that earns a permanent place in the family recipe box. It leans on simple pantry-and-fridge staples to create tender chicken, savory mushrooms, and gooey melted Swiss cheese in one cozy dish, and it’s easy to see why a recipe like this would keep showing up at reunions for decades. On busy weeknights, I love having a dependable baked dinner like this that feels a little nostalgic and still comes together with almost no prep.
Serve this chicken lombardy with buttered egg noodles, mashed potatoes, or fluffy rice to catch the creamy sauce. If you want to round out the plate, a simple green salad, steamed green beans, or roasted broccoli make great easy sides, and warm dinner rolls are perfect for scooping up every last bit from the casserole dish.
Oven Baked 3-Ingredient Chicken Lombardy
Servings: 4 to 6
Ingredients
4 boneless, skinless chicken breasts
1 can condensed cream of mushroom soup, undiluted
8 slices Swiss cheese
Directions
1. Preheat the oven to 350°F and lightly grease a white oval casserole dish or 9x13-inch baking dish.
2. Arrange the chicken breasts in the prepared baking dish in a single layer.
3. Spread the condensed cream of mushroom soup evenly over the chicken, covering the tops as completely as possible.
4. Lay the Swiss cheese slices over the soup-coated chicken, overlapping slightly so the surface is mostly covered.
5. Bake uncovered for 35 to 45 minutes, or until the chicken is cooked through and the cheese is melted, bubbling, and lightly golden on top.
6. Let the casserole rest for 5 minutes before serving so the sauce settles slightly.
Variations & Tips
Add mushrooms: If you want a heartier classic lombardy feel, scatter 8 ounces of sliced sautéed mushrooms over the chicken before adding the cheese. It adds more savory flavor and gives the casserole a fuller texture.
Use chicken cutlets: For faster cooking on a busy weeknight, use thin chicken cutlets or pound the chicken breasts to an even thickness. This helps the chicken cook more evenly and can shorten the bake time.
Make it a little richer: A spoonful of sour cream or a splash of milk stirred into the soup will create a slightly creamier sauce. This is especially nice if you plan to serve it over rice or noodles.
Check doneness: The safest and easiest way to avoid dry chicken is to use an instant-read thermometer. Pull the dish from the oven when the thickest part of the chicken reaches 165°F.
Prep ahead: You can assemble the casserole a few hours in advance, cover it, and refrigerate until dinner. If baking straight from the fridge, add a few extra minutes to the cooking time.