This creamy French Onion Chicken is a simple yet crave-worthy dinner that’s made in one skillet! Tender chicken breasts are covered in a rich gravy with caramelized onions, then piled with Gruyere and baked to form a perfectly melty, cheesy layer on top.
Melt 3 Tablespoons butter in a large oven-proof skillet over medium heat. Add the 3 medium onions and cook for about 20-25 minutes, or until onions are golden and beginning to caramelize.
Stir in the ¼ cup cognac and 1/2 cup dry white wine. Bring the mixture to a boil and then reduce to a simmer. Simmer for 2-3 minutes until the alcohol is cooked off and slightly reduced. Stir in 2 Tablespoons flour. Cook for 1 minute.
Slowly whisk in 2 cups beef broth. Add 1 teaspoon kosher salt, 1 teaspoon sugar, ½ teaspoon black pepper and 3 sprigs fresh thyme. Bring to a boil and reduce to a simmer. Simmer for 3-4 minutes until slightly thickened. Then remove from skillet and set aside. Remove thyme sprigs.
Season 4 chicken breasts with salt and pepper.
Heat 1 Tablespoon olive oil in the now empty skillet over medium-high heat. Once oil is hot, add chicken breasts and cook about 3-4 minutes per side, until golden. Return onions to skillet and sprinkle 6 ounces gruyere cheese over the chicken. Place the skillet in your preheated oven and bake for 8-10 minutes until chicken is cooked through and cheese is melted.
Spoon some of the onions and gravy over the top of the chicken, garnish with fresh chopped parsley, and serve.
Video
Notes
Reheating instructions
Reheat in the oven preheated to 350 degrees for 20-30 minutes, or until warmed through.
Recipe tips
Chicken: Choose pieces of chicken that are close in size, then pound them to uniform thickness. This will help them all cook evenly.
Caramelizing onions:Don’t cook the onions any higher than medium heat. This step takes quite a while, but don’t rush it. The onions turn out best when cooked longer over a lower heat.
Reheating:To reheat this chicken, preheat the oven to 350 degrees. Cook for 20-30 minutes, or until the chicken is warmed through.