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Perfect French Onion Chicken Recipe with Melted Gruyere Cheese

French onion chicken - featured image
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A cozy and delicious weeknight dinner featuring tender chicken breasts topped with sweet caramelized onions and melted nutty Gruyere cheese. Easy to prepare and perfect for chilly evenings.

Ingredients

Scale
  • 4 boneless, skinless chicken breasts (about 6 oz/170g each)
  • 3 large yellow onions, thinly sliced
  • 1 ½ cups (150g) shredded Gruyere cheese
  • 3 tablespoons (45g) unsalted butter
  • 3 garlic cloves, minced
  • 1 cup (240ml) beef broth
  • 1 tablespoon Dijon mustard
  • 1 teaspoon fresh thyme, chopped
  • 2 tablespoons olive oil
  • Salt and freshly ground black pepper, to taste
  • Optional: ¼ cup (60ml) dry white wine

Instructions

  1. Heat 3 tablespoons of butter over medium heat in a large skillet. Add the thinly sliced onions and a pinch of salt. Cook slowly, stirring occasionally, for about 25-30 minutes until the onions turn golden brown and jammy. Add a splash of water or broth if onions start sticking.
  2. Stir in the minced garlic and cook for 1 minute until fragrant. If using, pour in the white wine or a bit of beef broth to deglaze the pan, scraping up any browned bits. Let it simmer until mostly evaporated, about 2-3 minutes.
  3. While onions cook, pat chicken breasts dry and season generously with salt and pepper. Heat 2 tablespoons of olive oil in another skillet over medium-high heat. Sear chicken for 3-4 minutes per side until golden but not fully cooked through. Set aside.
  4. Stir the Dijon mustard and fresh thyme into the caramelized onions. Add the remaining beef broth and bring to a gentle simmer. Let the mixture reduce slightly for 3-4 minutes until thickened.
  5. Place seared chicken breasts in an ovenproof dish or skillet. Spoon the onion mixture evenly over the chicken, then top each piece with a generous handful of shredded Gruyere cheese.
  6. Bake in a preheated oven at 375°F (190°C) for 15-20 minutes until the cheese is bubbly and golden and the chicken reaches an internal temperature of 165°F (74°C).
  7. Let the chicken rest for 5 minutes before serving to allow juices to settle.

Notes

Slowly caramelize onions for best sweetness and texture. Dry chicken before searing for a nice crust. Rest chicken after baking to keep it juicy. For extra crispy cheese edges, broil for last 2 minutes watching closely. Add small splashes of broth if onions dry out during cooking.

Nutrition

Keywords: French onion chicken, caramelized onions, Gruyere cheese, easy chicken recipe, weeknight dinner, comfort food

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