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One-Pan French Onion Chicken Bake with Caramelized Onions and Gruyère

Close-up of a serving of french onion chicken topped with melted cheese and caramelized onions in a white dish.
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Make this French Onion Chicken Bake for a rich, savory dinner. It features tender chicken breasts topped with deeply caramelized onions and melted Gruyère cheese. This recipe delivers classic French Onion Soup flavors in an easy, oven-baked format.

Ingredients

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  • 4 boneless, skinless chicken breasts
  • 2 tablespoons olive oil
  • 3 large yellow onions, thinly sliced
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1 tablespoon all-purpose flour
  • 1 cup low-sodium beef broth
  • 1 tablespoon Worcestershire sauce
  • 1 teaspoon dried thyme
  • 1 cup shredded Gruyère cheese (or Provolone)
  • 1/4 cup crispy fried onions (optional, for topping)

Instructions

  1. Preheat your oven to 400 degrees Fahrenheit. Lightly grease a 9×13 inch baking dish.
  2. Season the chicken breasts on both sides with salt and pepper. Set aside.
  3. Heat the olive oil in a large oven-safe skillet over medium heat. Add the sliced onions and cook slowly for 15 to 20 minutes, stirring occasionally, until they are deeply softened and caramelized. This step builds the main flavor.
  4. Sprinkle the flour over the caramelized onions and stir for one minute.
  5. Pour in the beef broth and Worcestershire sauce. Stir well, scraping up any browned bits from the bottom of the skillet. Stir in the dried thyme. Let the mixture simmer for 2 minutes until it thickens slightly.
  6. Nestle the seasoned chicken breasts into the onion mixture in the skillet.
  7. Transfer the skillet to the preheated oven. Bake for 15 minutes.
  8. Remove the skillet from the oven. Top each chicken breast evenly with the shredded Gruyère cheese.
  9. Return the dish to the oven and bake for another 5 to 10 minutes, or until the chicken reaches an internal temperature of 165 degrees Fahrenheit and the cheese is melted and bubbly.
  10. If using, sprinkle the crispy fried onions over the cheese before serving immediately.

Notes

  • For an even richer flavor, use homemade beef broth instead of store-bought.
  • If you do not have an oven-safe skillet, transfer the onion mixture to your baking dish before adding the chicken.
  • Serve this hearty chicken and cheese dish over egg noodles or mashed potatoes to soak up the savory sauce.

Nutrition

Find it online: https://completelyyummy.com/french-onion-chicken-bake-caramelized-onions/