French Onion Chicken Skillet
French Onion Chicken Skillet features juicy seared chicken simmered with deeply caramelized onions and finished with melted Gruyère cheese. A rich, comforting one-pan dinner inspired by classic French onion flavors.
Ingredients
- 4 chicken breasts
- 1 teaspoon salt
- ½ teaspoon freshly ground black pepper
- 3 tablespoon olive oil
- 2 tablespoon butter
- 3 large yellow onions thinly sliced
- 2 garlic cloves minced
- 1 teaspoon fresh thyme or ½ teaspoon dried thyme
- 120 ml dry white wine
- 240 ml chicken broth
- 1 tablespoon Worcestershire sauce
- 1 teaspoon balsamic vinegar
- 150 g Gruyère cheese shredded
- Fresh parsley for garnish (optional)
Instructions
- Pat 4 chicken breasts dry and season both sides with 1 teaspoon salt and ½ teaspoon freshly ground black pepper.
- Heat 3 tablespoons olive oil in a large oven-safe skillet over medium heat. Add the chicken and sear for 4–5 minutes per side until golden brown. Remove the chicken from the skillet and set aside.
- In the same skillet, add 2 tablespoons of butter and 3 large yellow onions, thinly sliced. Cook over medium-low heat for 20–25 minutes, stirring occasionally, until the onions are soft, golden, and deeply caramelized. Reduce the heat if they brown too quickly.
- Add 2 minced garlic cloves and 1 teaspoon fresh thyme (or ½ teaspoon dried thyme). Cook for 1 minute, stirring frequently, until fragrant.
- Pour in 120 ml dry white wine and scrape up any browned bits from the bottom of the skillet. Let it reduce for 2–3 minutes.
- Stir in 240 ml chicken broth, 1 tablespoon Worcestershire sauce, and 1 teaspoon balsamic vinegar. Bring to a gentle simmer and cook for 5 minutes.
- Return the chicken to the skillet and spoon the onions over the top. Simmer for 8–10 minutes, or until the chicken reaches 74°C (165°F) internally.
- Preheat the broiler. Sprinkle 150 g shredded Gruyère cheese evenly over each piece of chicken. Transfer the skillet to the oven and broil for 1–2 minutes, until the cheese is melted and bubbly.
- Garnish with fresh parsley if desired and serve hot.
Notes
Caramelize Slowly for Best Flavor: The onions are the heart of this dish, and I keep the heat at medium-low so they turn soft and deeply golden without burning. If the pan feels too hot, I lower the heat instead of trying to push them faster.
Deglaze Properly: When I pour in the white wine, I take a moment to scrape the bottom of the skillet really well. Those browned bits, I find, melt into the sauce and give it that deeper French-onion flavor.
Use an Oven-Safe Skillet: I always use a skillet that can go straight under the broiler, including the handle, so nothing needs transferring. It makes the whole finish smoother, and I get the best cheesy top without extra dishes.
Cheese Melting Tip: Broil just until the Gruyère is melted and bubbling; I stay close because it can change fast. If it sits too long, I notice the cheese can separate and look oily.
Nutrition
Calories: 625kcal | Carbohydrates: 11g | Protein: 61g | Fat: 34g | Saturated Fat: 13g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 15g | Trans Fat: 0.3g | Cholesterol: 202mg | Sodium: 1438mg | Potassium: 1069mg | Fiber: 2g | Sugar: 5g | Vitamin A: 630IU | Vitamin C: 11mg | Calcium: 427mg | Iron: 2mg
