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A close-up of juicy chicken smothered in caramelized onions and melted bubbly Gruyère cheese, garnished with fresh parsley in a grey bowl.

Gruyère French Onion Soup Chicken

Gruyère French Onion Soup Chicken combines juicy pan-seared chicken with deeply caramelized onions, rich broth, and melted Gruyère cheese for a comforting, restaurant-style dinner.
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings: 4 servings
Course: Dinner
Cuisine: French Inspired
Calories: 520
Ingredients Equipment Method Notes

Ingredients
  

Chicken
  • 4 boneless skinless chicken breasts
  • salt and black pepper to taste
  • 1 tbsp olive oil
French Onion Sauce
  • 2 tbsp butter
  • 3 yellow onions large, thinly sliced
  • 2 garlic cloves minced
  • 1 tsp fresh thyme leaves
  • 1 cup beef broth
  • 1/2 cup chicken broth
  • 1 tsp cornstarch mixed with 1 tbsp water
Topping
  • 1 1/2 cups Gruyère cheese shredded
  • fresh parsley chopped, for garnish

Equipment

  • Large Skillet

Method
 

  1. Season the chicken breasts on both sides with salt and black pepper.
  2. Heat olive oil in a large skillet over medium heat.
  3. Add the chicken and cook for 5–6 minutes per side until golden and cooked through. Remove and set aside.
  4. In the same skillet, melt the butter over medium-low heat.
  5. Add the sliced onions and cook slowly for 20–25 minutes, stirring often, until deeply caramelized.
  6. Add the garlic and thyme, cooking for about 30 seconds until fragrant.
  7. Pour in the beef broth and chicken broth, scraping the bottom of the skillet to release browned bits.
  8. Stir in the cornstarch mixture and simmer for 2–3 minutes until slightly thickened.
  9. Return the chicken to the skillet and spoon the onion sauce over the top.
  10. Sprinkle the Gruyère cheese evenly over each chicken breast.
  11. Cover the skillet and cook for 3–5 minutes until the cheese is fully melted and bubbly.
  12. Garnish with fresh parsley and serve hot.

Notes

Serve with mashed potatoes, crusty bread, or roasted vegetables to soak up the rich onion sauce.