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.

french onion chicken casserole

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!

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French Onion Chicken Casserole Recipe

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  • Author: Lisa
  • 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

Units Scale
  • 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

  1. Caramelize Onions:
    1. Add the butter and vegetable oil to a large pan. Melt over medium-low heat.
    2. Once melted, add the sliced onions and stir to coat.
    3. Let it sit over medium-low heat for 10 minutes without stirring.
    4. After 10 minutes, begin stirring occasionally for another 20-30 minutes, or until the onions are deeply caramelized.
    5. Add the salt, pepper, and minced garlic. Stir for 30 seconds.
  2. Cook Rice Mixture:
    1. Add the chicken broth, Worcestershire sauce, and rice to the pan. Stir to combine.
    2. Bring to a boil, then reduce heat to low.
    3. Cover and cook for 20 minutes.
  3. Combine Ingredients:
    1. Preheat oven to 350°F (175°C).
    2. Once the rice is cooked, add the heavy cream and shredded chicken. Stir to combine.
  4. Assemble Casserole:
    1. Spray a 9×13 inch baking dish with non-stick cooking spray.
    2. Scoop the rice mixture into the baking dish.
    3. Sprinkle the shredded Swiss cheese evenly over the top.
  5. Bake:
    1. Place the dish in the preheated oven and bake until the cheese is melted and golden brown, about 10 minutes.
  6. Garnish and Serve:
    1. Sprinkle with parsley (optional).
    2. 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

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