French Onion Chicken Casserole

A hearty, protein-packed casserole that combines tender chicken with the savory flavors of French onion soup and creamy Swiss cheese, perfect for busy weeknights.

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Prep Time 15

Cook Time 35

Total Time 50

Servings: 6 servings

Course: Dinner, Main Course

Cuisine: American

Calories: 450

Ingredients Method Notes

Ingredients

Main Ingredients

4 cups cooked, shredded chicken (about 3-4 whole breasts, or one large rotisserie chicken) Use leftover roast chicken for an even quicker assembly.
1 cup sour cream Adds creaminess and a tangy flavor.
1 can (10.5-ounce) condensed cream of chicken soup Helps bind the casserole and adds richness.
1 can (10.5-ounce) French onion soup Infuses classic French onion flavor throughout.
1.25 cups shredded Swiss cheese (or Gruyere cheese) Choose high-quality cheese for best results.
1 envelope onion soup mix (about 3 tablespoons) Enhances the onion flavor profile.
2.5 cups French-fried onions (about 1 6-ounce package) Gives a delightful crunch to the top layer.

Method

Preparation

Preheat your oven to 350 degrees Fahrenheit and spray a 9 x 13-inch baking dish with nonstick cooking spray.
In a large bowl, combine cooked, shredded chicken, sour cream, condensed cream of chicken soup, French onion soup, shredded Swiss cheese, and onion soup mix. Mix thoroughly until all ingredients are well incorporated and set aside.
Spoon the chicken mixture evenly into the prepared baking dish.

Baking

Bake uncovered for 25-30 minutes until heated through and bubbling around the edges.
Remove from the oven and sprinkle French-fried onions over the top. Bake for an additional 5-10 minutes to achieve that perfect golden crunch.
After baking, let the casserole stand for 5-10 minutes before serving.

Notes

Serve with a side of veggies for a more rounded meal. Leftovers can be reheated and make for an excellent meal prep option. Ensure all ingredients are at room temperature for consistent cooking.