This French Onion Chicken Casserole is the ultimate comfort food, bringing the rich, savory flavors of French onion soup to a hearty, satisfying meal! Caramelized onions, tender chicken, and gooey Swiss cheese combine in a creamy rice casserole that’s perfect for family dinners. Trust me, you’ll love how this decadent dish warms your heart and fills your belly!
Why You’ll Love This Recipe
- Rich & Savory: Deep, caramelized onion flavor.
- Comforting & Hearty: A satisfying meal for any occasion.
- Easy to Assemble: Simple steps for a delicious casserole.
- Crowd-Pleasing: A hit with the whole family.

Ingredients
- Salted Butter: Adds richness to the onions.
- Vegetable Oil: Helps prevent butter from burning.
- Large Onions (Sliced): Provides the signature sweet, savory flavor.
- Salt & Pepper: Seasons the onions.
- Minced Garlic: Adds aromatic depth.
- Chicken Broth: Forms the liquid base.
- Worcestershire Sauce: Enhances savory flavors.
- White Rice: Provides a hearty base.
- Heavy Cream: Adds creaminess and richness.
- Cooked Chicken (Shredded): Provides protein.
- Swiss Cheese (Shredded): Adds gooey, nutty flavor.
Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.
How to Make French Onion Chicken Casserole
Step 1: Caramelize the Onions
Melt butter and oil in a large pan over medium-low heat. Add onions and let them sit for 10 minutes without stirring. Then, stir occasionally for 20-30 minutes until caramelized.
Step 2: Add Seasonings and Broth
Add salt, pepper, and garlic. Stir for 30 seconds. Add chicken broth, Worcestershire sauce, and rice. Bring to a boil, then simmer covered for 20 minutes.
Step 3: Combine Ingredients
Stir in heavy cream and shredded chicken.
Step 4: Assemble the Casserole
Spray a 9×13 baking dish. Pour in the rice mixture.
Step 5: Add Cheese and Bake
Sprinkle Swiss cheese over the top. Bake at 350°F until cheese is melted, about 10 minutes.
Step 6: Garnish and Serve
Sprinkle with parsley (optional). Serve hot.
Pro Tips for Making the Recipe
- Be patient when caramelizing the onions; it’s key to the flavor.
- Use pre-cooked or rotisserie chicken for convenience.
- Adjust seasonings to your preference.
How to Serve French Onion Chicken Casserole

- Serve hot as a main course.
- Pair with a side salad or steamed vegetables.
- Enjoy as a comforting meal on a chilly day.
Make Ahead and Storage
- Storage: Refrigerate leftovers in an airtight container for up to 3 days.
- Reheating: Reheat in the oven or microwave until warmed through.
FAQs
1. Can I use a different type of cheese?
Yes, Gruyère or mozzarella cheese are good alternatives.
2. Can I use brown rice instead of white rice?
Yes, but adjust cooking time as brown rice takes longer to cook.
3. Can I add other vegetables?
Absolutely! Sautéed mushrooms or spinach would be delicious additions.
4. Can I make this casserole ahead of time?
Yes, you can assemble the casserole and refrigerate it before baking. Add a few extra minutes to the baking time.
This French Onion Chicken Casserole is a deeply satisfying and flavorful meal that’s perfect for any occasion! Simple to prepare, packed with rich flavors, and endlessly comforting, this recipe is ideal for family dinners, cozy nights, or a special treat anytime. Enjoy the warm, savory goodness with every delicious bite!
Print
French Onion Chicken Casserole Recipe
- Prep Time: 35 minutes
- Cook Time: 30 minutes
- Total Time: 1 hour 5 minutes
- Yield: 6 servings 1x
- Category: Main Course
- Method: Baking
- Cuisine: French-inspired
Description
This French Onion Chicken Casserole is a comforting and flavorful dish that combines the rich, sweet taste of caramelized onions with tender chicken, creamy rice, and melted Swiss cheese. It’s a perfect one-pan meal for family dinners or potlucks, offering a delightful twist on classic comfort food.
Ingredients
- 3 tablespoons salted butter
- 3 tablespoons vegetable oil
- 4 large onions, sliced
- 1 teaspoon salt
- 1 teaspoon pepper
- 1 tablespoon minced garlic
- 4 cups chicken broth
- 1 tablespoon Worcestershire sauce
- 1 1/2 cups white rice
- 1 cup heavy cream
- 3 cups cooked chicken, shredded into bite-size pieces
- 16 ounces block of Swiss cheese, shredded
- Parsley, for garnish (optional)
Instructions
- Caramelize Onions:
- Add the butter and vegetable oil to a large pan. Melt over medium-low heat.
- Once melted, add the sliced onions and stir to coat.
- Let it sit over medium-low heat for 10 minutes without stirring.
- After 10 minutes, begin stirring occasionally for another 20-30 minutes, or until the onions are deeply caramelized.
- Add the salt, pepper, and minced garlic. Stir for 30 seconds.
- Cook Rice Mixture:
- Add the chicken broth, Worcestershire sauce, and rice to the pan. Stir to combine.
- Bring to a boil, then reduce heat to low.
- Cover and cook for 20 minutes.
- Combine Ingredients:
- Preheat oven to 350°F (175°C).
- Once the rice is cooked, add the heavy cream and shredded chicken. Stir to combine.
- Assemble Casserole:
- Spray a 9×13 inch baking dish with non-stick cooking spray.
- Scoop the rice mixture into the baking dish.
- Sprinkle the shredded Swiss cheese evenly over the top.
- Bake:
- Place the dish in the preheated oven and bake until the cheese is melted and golden brown, about 10 minutes.
- Garnish and Serve:
- Sprinkle with parsley (optional).
- Serve and enjoy.
Notes
- For deeper caramelized onions, cook them longer, stirring occasionally.
- You can use leftover rotisserie chicken or any cooked chicken you have on hand.
- Adjust the amount of Swiss cheese to your liking.
- For a richer flavor, use Gruyère cheese instead of Swiss.
- Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven or microwave.
Nutrition
- Serving Size: 1 Serving
- Calories: 500kcal
- Sugar: 8g
- Sodium: 800mg
- Fat: 30g
- Saturated Fat: 18g
- Unsaturated Fat: 12g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 2g
- Protein: 30g
- Cholesterol: 120mg