If you’re looking for a cozy, crowd-pleasing dish that combines the rich flavors of caramelized onions with tender chicken and melty cheese, this French Onion Chicken Casserole Recipe is an absolute gem. It’s comfort food elevated with simple ingredients you likely already have, coming together in a creamy, savory bake that’s perfect for busy weeknights or casual gatherings. With each bite, you’ll experience the irresistible blend of sharp cheddar, creamy sour cream French onion dip, and crispy fried onions, creating a harmony of textures and flavors that’s both familiar and delightfully satisfying.

Ingredients You’ll Need
Getting started with this French Onion Chicken Casserole Recipe is a breeze because it relies on straightforward, pantry-friendly ingredients that each play a vital role in delivering its deliciousness. From the tender cooked chicken that forms the hearty base to the crunchy topping that adds the perfect finishing touch, every item contributes to a wonderful balance of taste and texture.
- Cooked chopped chicken: Using 4 cups ensures plenty of protein and a satisfying bite in every serving.
- Shredded cheddar cheese: One cup of sharp cheddar melts into the casserole, adding richness and a slight tang.
- Refrigerated sour cream French onion dip: This 1 cup brings creamy depth and authentic French onion flavor without extra chopping or sautéing.
- Unsalted cream of chicken soup (10.5 oz): Acts as a silky binder, keeping the casserole moist and flavorful.
- French fried onions (2.8 oz can): Sprinkled on top for that iconic crispy crunch everyone loves in French onion dishes.
How to Make French Onion Chicken Casserole Recipe
Step 1: Prepare Your Baking Dish
Start by preheating your oven to 350ºF, then lightly spray a 9×9-inch baking dish with cooking spray. This step ensures your casserole won’t stick and will clean up easily, so you can focus on enjoying your meal instead of scrubbing pans later.
Step 2: Mix the Filling
In a large bowl, combine the chopped cooked chicken, shredded cheddar cheese, sour cream French onion dip, and cream of chicken soup. Stir everything together until it’s evenly mixed, creating a rich and creamy base that’s bursting with flavor and texture.
Step 3: Layer the Casserole
Spread the chicken mixture evenly into your prepared baking dish. This even layer helps the casserole bake uniformly, allowing every bite to be just as delicious as the last.
Step 4: Add the Crispy Topping
Sprinkle the French fried onions liberally over the top of the casserole. This topping bakes into a golden, crunchy layer that contrasts beautifully with the creamy filling beneath.
Step 5: Bake Until Bubbly and Golden
Bake the casserole uncovered for 30 to 40 minutes. Keep an eye on it so the onions get perfectly golden without burning. When you see bubbling edges and a toasted onion topping, your French Onion Chicken Casserole Recipe is ready to enjoy.
How to Serve French Onion Chicken Casserole Recipe

Garnishes
To elevate your presentation, sprinkle some fresh chopped parsley or chives over the baked casserole. These herbs add a burst of color and a subtle freshness that brightens the rich, creamy flavors.
Side Dishes
This casserole pairs wonderfully with simple sides like a crisp green salad or steamed vegetables such as green beans or broccoli. The freshness of the sides balances the casserole’s richness, making your meal feel complete and thoughtfully rounded.
Creative Ways to Present
Try serving individual portions in ramekins for a charming personal touch, perfect for dinner parties or cozy weeknight meals. You can also offer a side of crusty garlic bread to soak up any extra sauce, turning each bite into an even more indulgent experience.
Make Ahead and Storage
Storing Leftovers
If you have leftovers, store them in an airtight container in the refrigerator for up to 3 days. The casserole’s flavors deepen over time, making those next-day servings taste just as fantastic.
Freezing
This French Onion Chicken Casserole Recipe freezes beautifully. Place cooled leftovers in a freezer-safe container and freeze for up to 2 months. When you’re ready, thaw overnight in the fridge before reheating.
Reheating
Reheat individual portions in the microwave or warm the whole casserole in the oven at 350ºF until heated through and the top is again crisp and bubbly, usually about 20 minutes for a full baking dish.
FAQs
Can I use fresh onions instead of French onion dip?
Absolutely! While the dip adds convenience and classic flavor, you can caramelize fresh onions and mix them in for a homemade touch. Just adjust seasoning to taste.
Is it necessary to use cooked chicken?
Yes, using cooked chicken saves time and ensures the casserole cooks evenly without drying out your chicken pieces.
What if I’m allergic to dairy—can this be made dairy-free?
You can substitute dairy-free sour cream, cheese, and cream of chicken soup alternatives to make this recipe suitable for dairy allergies without sacrificing much flavor.
Can I add other vegetables to this casserole?
Definitely! Chopped mushrooms, spinach, or even bell peppers can add extra nutrients and flavor—just mix them in with the chicken before baking.
How do I get the French fried onions crispy and not soggy?
Adding the fried onions right before baking and baking uncovered helps them stay crisp. If they soften, you can always broil the casserole for a minute or two at the end for extra crunch.
Final Thoughts
This French Onion Chicken Casserole Recipe is one of those dishes you’ll want to keep in your dinner rotation. It’s easy, comforting, and full of flavor, making it a beloved option for sharing with family and friends. Trust me, once you try it, it’ll become a go-to favorite that’s as reliable as it is delicious—so go ahead, give it a try tonight!
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French Onion Chicken Casserole Recipe
- Prep Time: 10 minutes
- Cook Time: 35 minutes
- Total Time: 45 minutes
- Yield: 6 servings
- Category: Casserole
- Method: Baking
- Cuisine: American
Description
This creamy and comforting French Onion Chicken Casserole combines tender cooked chicken with shredded cheddar cheese, sour cream French onion dip, and cream of chicken soup, all topped with crispy French fried onions. Perfect for an easy weeknight dinner or a satisfying family meal, this casserole bakes to golden, bubbly perfection in just over half an hour.
Ingredients
Main Ingredients
- 4 cups cooked chopped chicken
- 1 cup shredded cheddar cheese
- 1 cup refrigerated sour cream French Onion Dip
- 1 (10.5-oz) can unsalted cream of chicken soup
- 1 (2.8-oz) can French fried onions
Instructions
- Preheat the Oven: Preheat your oven to 350ºF (175ºC) and lightly spray a 9×9-inch baking dish with cooking spray to prevent sticking.
- Mix the Filling: In a large bowl, combine the chopped cooked chicken, shredded cheddar cheese, sour cream French onion dip, and the can of unsalted cream of chicken soup. Mix everything thoroughly until well blended.
- Assemble the Casserole: Spread the chicken mixture evenly into the prepared baking dish to create an even layer.
- Add the Topping: Sprinkle the French fried onions evenly over the top of the chicken mixture for a crispy texture.
- Bake: Place the uncovered casserole into the preheated oven and bake for 30 to 40 minutes, or until the casserole is bubbly and the onions are golden brown.
Notes
- You can substitute leftover rotisserie chicken or other cooked chicken to save time.
- For extra flavor, add a teaspoon of Worcestershire sauce or garlic powder to the chicken mixture.
- If you prefer a lower fat version, use reduced-fat cheddar cheese and a light sour cream French onion dip.
- Serve this casserole with a fresh green salad or steamed veggies to round out the meal.
- Leftovers can be refrigerated in an airtight container for up to 3 days and reheated in the oven or microwave.

