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French Onion Baked Chicken

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French Onion Baked Chicken is a cozy, one-pan dinner inspired by French onion soup, with tender chicken breasts baked in a rich caramelized onion and beef broth sauce, topped with melty provolone and Swiss cheese. Perfect for weeknights or special dinners, this cheesy baked chicken is savory, comforting, and full of deep flavor.

Ingredients

  • For the Onions:
  • 2 tbsp olive oil
  • 4 tbsp salted butter
  • 2 large yellow or white onions, sliced
  • 1 tsp granulated sugar
  • ½ tsp coarse sea salt
  • 23 sprigs fresh thyme (leaves removed)
  • 1 bay leaf
  • 12 cloves garlic, minced
  • For the Chicken and Sauce:
  • 4 boneless, skinless chicken breasts (6 oz each)
  • ½ tsp black pepper
  • 1 tbsp all-purpose flour
  • ½ cup dry white wine (optional)
  • 1 cup beef stock
  • For the Topping:
  • 1 cup grated provolone cheese (about ¼ lb)
  • 1 cup grated Swiss cheese (about ¼ lb)
  • Fresh thyme, for garnish

Instructions

  1. In a skillet over medium heat, melt olive oil and butter. Add onions and cook 10 minutes. Add sugar, salt, thyme, and bay leaf; continue cooking 15–20 minutes, stirring often. Stir in garlic during the last 2 minutes.
  2. While onions cook, pound chicken to even thickness and season with pepper. Remove onions from skillet.
  3. In the same skillet, sear chicken 3–4 minutes per side until golden. Remove and set aside.
  4. Return onions to skillet. Sprinkle with flour and stir for 1–2 minutes. Add wine (or stock) and beef stock. Simmer 2–3 minutes until thickened.
  5. Nestle chicken into skillet, spoon onions over top, and sprinkle with cheeses. Bake at 350°F for 20–25 minutes until cheese is bubbly and chicken is cooked through.
  6. Garnish with thyme and spoon extra sauce over each piece.

Notes

  • Use chicken thighs instead of breasts if preferred.
  • Substitute Gruyère or mozzarella for provolone or Swiss.
  • Add mushrooms for extra umami.
  • Skip the wine and use more beef stock if avoiding alcohol.

Nutrition