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Dinner / French Onion Chicken Casserole: A Deliciously Easy Recipe for Comfort Food Lovers

French Onion Chicken Casserole: A Deliciously Easy Recipe for Comfort Food Lovers

April 23, 2025 by BettyDinner

French Onion Chicken Casserole is a delightful dish that brings together the rich flavors of caramelized onions and tender chicken, all enveloped in a creamy, cheesy sauce. This comforting casserole is not just a meal; it’s a warm hug on a chilly evening. The origins of French onion soup date back to the 18th century, but this casserole takes that classic flavor profile and transforms it into a hearty, family-friendly dish that everyone can enjoy.

People love French Onion Chicken Casserole for its incredible taste and texture. The combination of savory onions, juicy chicken, and gooey cheese creates a symphony of flavors that dance on your palate. Plus, it’s incredibly convenient to prepare, making it a perfect weeknight dinner option. Whether you’re serving it to your family or bringing it to a potluck, this casserole is sure to impress and satisfy. Join me as we dive into this delicious recipe that will quickly become a favorite in your home!

French Onion Chicken Casserole this Recipe

Ingredients:

  • 4 boneless, skinless chicken breasts
  • 2 large onions, thinly sliced
  • 3 tablespoons olive oil
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1 teaspoon garlic powder
  • 1 teaspoon dried thyme
  • 1 cup beef broth
  • 1 cup heavy cream
  • 1 cup shredded Gruyère cheese
  • 1 cup French bread crumbs
  • 2 tablespoons fresh parsley, chopped (for garnish)

Preparing the Chicken

1. Start by preheating your oven to 375°F (190°C). This will ensure that your casserole cooks evenly and thoroughly. 2. While the oven is heating, take your boneless, skinless chicken breasts and season them with salt, black pepper, garlic powder, and dried thyme. I like to rub the seasonings into the chicken to ensure they are well-coated. 3. In a large skillet, heat 2 tablespoons of olive oil over medium-high heat. Once the oil is hot, add the seasoned chicken breasts. Sear them for about 5-7 minutes on each side until they are golden brown. This step adds a lovely depth of flavor to the chicken. 4. Once the chicken is browned, remove it from the skillet and set it aside on a plate. Don’t worry about cooking it all the way through at this point; it will finish cooking in the oven.

Caramelizing the Onions

5. In the same skillet, add the remaining tablespoon of olive oil. Toss in the thinly sliced onions. Stir them occasionally, allowing them to cook down and caramelize. This process usually takes about 15-20 minutes. You want them to be soft and golden brown, which brings out their natural sweetness. 6. Once the onions are caramelized, pour in the beef broth. Scrape the bottom of the skillet with a wooden spoon to deglaze it, incorporating all those flavorful bits stuck to the pan. Let the mixture simmer for about 5 minutes, allowing the broth to reduce slightly. 7. After simmering, stir in the heavy cream. This will create a rich and creamy sauce that will coat the chicken and onions beautifully. Allow the mixture to simmer for another 2-3 minutes, then remove it from the heat.

Assembling the Casserole

8. In a large casserole dish, place the seared chicken breasts in a single layer. Make sure they are evenly spaced out. 9. Pour the caramelized onion and cream mixture over the chicken, ensuring that each piece is well-covered. The creamy sauce will seep into the chicken, making it incredibly tender and flavorful. 10. Now, it’s time to add the cheese! Sprinkle the shredded Gruyère cheese evenly over the top of the casserole. This cheese melts beautifully and adds a wonderful nutty flavor. 11. Finally, sprinkle the French bread crumbs over the cheese layer. This will create a delightful crunchy topping once baked. If you want an extra crispy topping, you can drizzle a little olive oil over the bread crumbs.

Baking the Casserole

12. Cover the casserole dish with aluminum foil to prevent the top from browning too quickly. Place it in the preheated oven and bake for 25 minutes. 13. After 25 minutes, remove the foil and continue baking for an additional 15-20 minutes, or until the cheese is bubbly and golden brown, and the chicken is cooked through (internal temperature should reach 165°F or 74°C). 14. Once done, remove the casserole from the oven and let it sit for about 5-10 minutes. This resting time allows the sauce to thicken slightly and makes it easier to serve.

Serving the Casserole

15. To serve, use a large spoon to scoop out portions of the casserole. I like to garnish each serving with a sprinkle of fresh parsley for a pop of color and freshness. 16. This French Onion Chicken Casserole pairs wonderfully with a simple green salad or some steamed vegetables. The creamy, savory flavors of the casserole are sure to impress your family and friends. 17. Enjoy your delicious creation! I love how this dish combines the comforting flavors of French onion soup with tender chicken, making it a perfect meal for any occasion. Feel free to customize this recipe by adding your favorite vegetables or herbs. Cooking is all about experimenting and making it your own!

French Onion Chicken Casserole

Conclusion:

In summary, this French Onion Chicken Casserole is an absolute must-try for anyone looking to elevate their weeknight dinners with a dish that is both comforting and packed with flavor. The combination of tender chicken, rich caramelized onions, and gooey cheese creates a symphony of tastes that will have your family and friends coming back for seconds. Plus, it’s incredibly easy to prepare, making it perfect for busy evenings when you still want to serve something special. For serving suggestions, consider pairing this casserole with a simple green salad or some crusty bread to soak up all that delicious sauce. If you’re feeling adventurous, you can also experiment with variations by adding vegetables like mushrooms or bell peppers, or even swapping out the chicken for a hearty beef or vegetarian option. The possibilities are endless! I wholeheartedly encourage you to give this French Onion Chicken Casserole a try. I promise you won’t be disappointed! Once you’ve made it, I’d love to hear about your experience. Share your thoughts, any tweaks you made, or even a photo of your creation. Let’s spread the love for this delightful dish together! Happy cooking!

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French Onion Chicken Casserole: A Deliciously Easy Recipe for Comfort Food Lovers


  • Author: Maria
  • Total Time: 60 minutes
  • Yield: 4–6 servings 1x
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Description

Enjoy a comforting French Onion Chicken Casserole featuring tender chicken breasts in a creamy caramelized onion and Gruyère cheese sauce, topped with crispy bread crumbs. Perfect for family dinners!


Ingredients

Scale
  • 4 boneless, skinless chicken breasts
  • 2 large onions, thinly sliced
  • 3 tablespoons olive oil
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1 teaspoon garlic powder
  • 1 teaspoon dried thyme
  • 1 cup beef broth
  • 1 cup heavy cream
  • 1 cup shredded Gruyère cheese
  • 1 cup French bread crumbs
  • 2 tablespoons fresh parsley, chopped (for garnish)

Instructions

  1. Preheat your oven to 375°F (190°C).
  2. Season the chicken breasts with salt, black pepper, garlic powder, and dried thyme, rubbing the seasonings into the meat.
  3. Heat 2 tablespoons of olive oil in a large skillet over medium-high heat. Sear the chicken breasts for 5-7 minutes on each side until golden brown. Remove from skillet and set aside.
  4. In the same skillet, add the remaining tablespoon of olive oil and the sliced onions. Cook, stirring occasionally, for 15-20 minutes until soft and golden brown.
  5. Pour in the beef broth, scraping the bottom of the skillet to deglaze. Simmer for about 5 minutes.
  6. Stir in the heavy cream and let the mixture simmer for another 2-3 minutes before removing from heat.
  7. In a large casserole dish, place the seared chicken breasts in a single layer.
  8. Pour the caramelized onion and cream mixture over the chicken, ensuring each piece is well-covered.
  9. Sprinkle the shredded Gruyère cheese evenly over the top.
  10. Top with French bread crumbs, and drizzle a little olive oil over the crumbs for extra crispiness if desired.
  11. Cover the casserole with aluminum foil and bake for 25 minutes.
  12. Remove the foil and continue baking for an additional 15-20 minutes, or until the cheese is bubbly and golden brown, and the chicken reaches an internal temperature of 165°F (74°C).
  13. Let the casserole sit for 5-10 minutes before serving.
  14. Scoop out portions of the casserole and garnish with fresh parsley.
  15. Serve with a simple green salad or steamed vegetables for a complete meal.

Notes

  • Feel free to customize this recipe by adding your favorite vegetables or herbs.
  • For a spicier kick, consider adding a pinch of red pepper flakes to the onion mixture.
  • Prep Time: 15 minutes
  • Cook Time: 45-50 minutes

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