This French Onion Chicken Bake is a great way to enjoy the flavors of French Onion Soup with ease. Enjoy perfectly seasoned chicken cutlets covered in caramelized onions and cheese.
Season both sides of the chicken breasts with ½ teaspoon each of salt, pepper, and garlic powder.
In a large oven-safe skillet, melt about a tablespoon of butter over medium-high heat. Once melted and bubbly, add the cutlets and brown on each side for 3-4 minutes (they might not be fully cooked; that's fine). Remove from the pan and set aside.
In the same skillet used to cook the chicken, melt 4 tablespoons of butter. Add 2 thinly sliced onions and cook over medium heat for 3-4 minutes, until slightly browned. Sprinkle with 1 tablespoon of sugar and 1 teaspoon of salt.
Add a tablespoon of water to the onions. Once the liquid evaporates, add another tablespoon of water, repeating until the onions are browned and soft.
Lower the heat and stir in 2 tablespoons of flour, cooking for about a minute. Add a 10.5 oz can of French onion soup, stirring until well combined. Season with 1 teaspoon each of thyme, parsley, and rosemary.
Add chicken to the French onion sauce, covering the meat. (At this point, transfer contents to a baking dish if your skillet is not oven-safe.) Sprinkle shredded Gruyere cheese over the top of the chicken.
Bake at 400°F for 15-20 minutes, until the sauce is bubbly and the cheese is golden brown.
Notes
If there are browned bits stuck to the bottom of the skillet after cooking the chicken, make sure to scrape them up as the onions cook. Those will add a ton of flavor to your sauce.
I prefer to make this dish in an oven-safe skillet so you can go right from stove to oven. If you don't have one, make sure to transfer the chicken bake to a baking dish before it goes into the oven.