French Onion Chicken Casserole Recipe

Introduction

This French Onion Chicken Casserole is a comforting and flavorful dish that combines tender shredded chicken with creamy soups and tangy sour cream. Topped with crispy French-fried onions and melted Swiss cheese, it’s perfect for an easy weeknight dinner or a cozy meal with family.

Ingredients

• 4 cups cooked, shredded chicken (about 3-4 whole breasts, or one large rotisserie chicken)
• 1 cup sour cream
• 1 (10.5-ounce) can condensed cream of chicken soup
• 1 (10.5-ounce) can French onion soup
• 1 ¼ cup shredded Swiss cheese (or Gruyere cheese)
• 1 envelope onion soup mix (about 3 tablespoons)
• 2 ½ cups French-fried onions (about 1 6-ounce package)

Instructions

1. Step 1: Preheat the oven to 350 degrees Fahrenheit and spray a 9 x 13-inch baking dish with nonstick cooking spray. Set aside.
2. Step 2: In a large bowl, combine the cooked shredded chicken, sour cream, condensed cream of chicken soup, French onion soup, shredded Swiss cheese, and onion soup mix. Mix well until all ingredients are evenly incorporated.
3. Step 3: Spread the chicken mixture evenly into the prepared baking dish.
4. Step 4: Bake uncovered for 25-30 minutes, until heated through and bubbling around the edges.
5. Step 5: Remove from the oven, sprinkle the French-fried onions evenly over the top, and return to the oven. Bake for an additional 5-10 minutes until the onions are golden and crispy.
6. Step 6: Let the casserole stand for 5-10 minutes before serving to allow it to set and cool slightly.

Tips & Variations

• For extra flavor, use Gruyere cheese instead of Swiss for a richer taste.
• You can substitute leftover turkey or rotisserie chicken to make this recipe even easier.
• Adding a handful of chopped fresh herbs like thyme or parsley can brighten the dish.
• If you prefer a creamier texture, stir in a bit of cream cheese or heavy cream.
• For a lower sodium version, use low-sodium soups and reduce the amount of onion soup mix.

Storage

Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, warm individual servings in the microwave or reheat the entire casserole covered with foil in a 350-degree Fahrenheit oven until heated through. The topping may lose some crispness upon reheating, so consider adding fresh French-fried onions before serving again.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I make this casserole ahead of time?

Yes, you can prepare the casserole up to the baking step and refrigerate it for a few hours before baking. Just add the French-fried onions before the final bake to keep them crispy.

What can I serve with French Onion Chicken Casserole?

This casserole pairs well with a simple green salad, steamed vegetables, or crusty bread to soak up the creamy sauce.

French Onion Chicken Casserole Recipe

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5 from 123 reviews

This French Onion Chicken Casserole is a comforting, creamy bake combining tender shredded chicken with flavorful French onion soup, Swiss cheese, and crispy French-fried onions for a deliciously cheesy, crunchy topping. Perfect for a hearty family dinner, this easy oven-baked dish blends savory and tangy elements in a satisfying casserole.

• Author: mia
• Prep Time: 10 minutes
• Cook Time: 35-40 minutes
• Total Time: 45-50 minutes
• Yield: 6–8 servings 1x
• Category: Casserole
• Method: Baking
• Cuisine: American

Ingredients

Scale 1x2x3x

Chicken Mixture

• 4 cups cooked, shredded chicken (about 3–4 whole breasts, or one large rotisserie chicken)
• 1 cup sour cream
• 1 (10.5-ounce) can condensed cream of chicken soup
• 1 (10.5-ounce) can French onion soup
• 1 ¼ cup shredded Swiss cheese (or Gruyère cheese)
• 1 envelope onion soup mix (about 3 tablespoons)

Topping

• 2 ½ cups French-fried onions (about one 6-ounce package)

Instructions

1. Prepare the oven and dish. Preheat your oven to 350°F (175°C). Lightly spray a 9 x 13-inch baking dish with nonstick cooking spray to prevent sticking and set aside.
2. Mix the chicken casserole filling. In a large bowl, combine the cooked, shredded chicken with sour cream, condensed cream of chicken soup, French onion soup, shredded Swiss cheese, and the onion soup mix. Stir all ingredients thoroughly until evenly mixed.
3. Spread the mixture. Transfer and evenly spread the chicken mixture into the prepared baking dish, smoothing the surface.
4. Bake the casserole. Place the dish uncovered in the preheated oven and bake for 25-30 minutes, until the casserole is heated through and bubbling at the edges.
5. Add the crispy onion topping. Remove the casserole from the oven and sprinkle the French-fried onions evenly on top. Return to the oven and bake for an additional 5-10 minutes to crisp the onions.
6. Rest and serve. Let the casserole stand for 5-10 minutes after baking to set before serving. This allows flavors to meld and makes serving easier.

Notes

• You can use leftover cooked chicken or a pre-cooked rotisserie chicken for convenience.
• Gruyère cheese is an excellent substitute for Swiss cheese if you prefer a slightly nuttier flavor.
• If you like a thicker sauce, reduce the amount of French onion soup to ½ cup.
• For extra crispiness, add the French-fried onions just before serving instead of baking them.
• This casserole pairs well with steamed vegetables or a fresh green salad.

Keywords: French Onion Chicken Casserole, chicken casserole, French onion soup recipe, comfort food, baked chicken dish, cheesy chicken casserole