French Onion Chicken Bake (One Pan) -

Name: French Onion Chicken
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Ingredients: 4 chicken breasts or thighs; 1 tsp garlic salt; ½ tsp black pepper; 2 tbsp olive oil; 1 tbsp butter; 2 large onions (thinly sliced); 1 tbsp Italian seasoning (or poultry seasoning works great too); 1 tbsp balsamic vinegar; 2 cloves garlic (minced); 2 tbsp all-purpose flour; 2 cups beef broth; 1 tbsp Worcestershire sauce; Salt & pepper (to taste); 1 cup shredded Gruyère (or mozzarella); 1 tbsp fresh parsley (chopped)

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This easy French Onion Chicken Bake is a simple one pan chicken dinner packed with savory, melty french onion flavors the whole family will love. Ready from start to finish in under an hour, it will definitely be a comfort food go-to meal.

close up view of french onion chicken in pan with dish towel in background

Chicken is definitely the favorite family protein in our house which makes total sense, it’s versatile and everyone loves it, but we try to keep it fresh with new flavors and ideas. This French Onion Chicken Bake is one of our newer go-to’s. It’s lip-smacking delicious, simple to make, ready in under an hour (perfect for hungry kids on a busy weeknight!) and made in one pan so clean-up is a cinch. It’s what we call a “winner winner, french onion chicken dinner”!

Made with tender chicken, golden caramelized onions and melty, cheesy gruyere baked to bubbly perfection, this recipe has all of the deep, savory flavors of french onion soup and roasted chicken in the same bite. This French Onion Chicken Bake is rich and comforting, and easy enough to serve during the week, but special enough for weekend entertaining.

If you like this easy and delicious one pot recipe, try these other dinner ideas. We love this One Pan Caprese Chicken and this simple One Pan Garlic Pasta is packed with flavor.

Why You’ll Love This Recipe

One-Pan Meal: Everything gets cooked in the same, single pan, making it super convenient and clean up a breeze.
French Onion Flavor: This is packed with that signature deep, savory french onion flavor from the golden, slow-cooked caramelized onions, to the nutty Gruyere cheese.
Tender Chicken: Nestled into a savory sauce and topped with melty cheese, the chicken is always tender and moist, never dried out.
You’ll Probably have No Leftovers: This is truly a favorite with everyone. Adults and kids love it (yes, really – my kids request it!), and it’s simple enough to make on a weeknight, but feels fancy enough for entertaining.

Ingredients

Chicken: Boneless, skinless breasts or thighs work well. Breast meat will be leaner, while thigh meat will be extra juicy. You can also use a combination.
Garlic Salt & Black Pepper: Initial flavor to season the chicken.
Olive Oil: Will give the chicken a nice golden crust when sautéing.
Butter: Rich and decadent to slow cook the onions in.
Onions: The star of the show, cook these low and slow – don’t rush the process.
Italian Seasoning: Added savory flavorings while the onions caramelize. Poultry seasoning works well too.
Balsamic Vinegar: Adds sweet-tangy notes.
Garlic: Aromatic flavor that pairs well with the onions.
Flour: To thicken the sauce.
Beef Broth: Rich and savory.
Worcestershire Sauce: Adds that umami punch.
Gruyere: Nutty and melty, for that classic french onion soup flavor combination. Mozzarella also works well.
Parsley: For a fresh finish and pop of color for garnish.

How To Make French Onion Chicken

1. Season the chicken on both sides with garlic salt and black pepper. Heat olive oil in a large skillet over medium-high heat and brown the chicken on both sides. Remove from the skillet and set aside.

raw chicken breasts seasoned with pepper and garlic salt

2. In the same skillet, melt the butter. Add the sliced onions and Italian seasoning. Cook, stirring occasionally, until the onions are soft, golden, and caramelized (about 15–20 minutes). Stir in the balsamic vinegar and cook for 1 more minute.

sliced onions starting to cook and caramelize in a pan.

3. Add the minced garlic and flour, stirring constantly for 1–2 minutes to cook out the raw flour taste.
4. Slowly pour in the beef broth while stirring, then add the Worcestershire sauce. Season with salt and pepper to taste.

beef broth added to the pan with sautéed sliced onions

5. Nestle the chicken back into the skillet. Reduce the heat and simmer until the sauce thickens and the chicken is cooked through.

pan with caramelized onions, broth and chicken breasts

6. Sprinkle the cheese over the top and transfer the skillet to a 400°F oven. Bake for about 5 minutes, or until the cheese is melted and bubbly.

chicken breasts topped with cheese in a pan with caramelized onions and broth

7. Garnish with chopped parsley and serve warm.

cooked chicken breasts topped with cheese and green herbs in caramelized onion sauce

french onion chicken in pan with a plated serving next to it on a small white plate with broccoli and potatoes

Expert Tips

Chicken Breasts vs. Thighs: Both are delicious options. Boneless, skinless breasts will be leaner while thighs tend to be slightly juicier. Try this recipe both ways, or with a combination.
Pound the Chicken before Cooking: If your chicken breasts are thicker on one side than the other, pound them thin with a meat mallet or rolling pin for even cooking.
Don’t Overcrowd The Pan: When browning the chicken, don’t stuff them in and overcrowd the pan. This will keep them from getting a nice, golden sear. Work in batches, if needed.
Deglaze With Water: When caramelizing the onions, deglaze with a splash of water if you notice things are overly browning or starting to stick. This will help loosen everything and steam the onions as they cook. Once they’re golden and caramelized, taste them before adding more salt.
Broil Setting: Broil the chicken once you add the gruyere for bubbly, golden brown cheese. Just be sure to keep an eye on it – it only takes a minute!
Try Other Cheeses: Gruyere is the classic choice, but Swiss, provolone, and mozzarella are other delicious, melty options, too.

Watch How to Make It

What To Serve With French Onion Chicken Bake

This one-pan chicken is delicious on its own, but if you’d like to pair a side with it, we like the below ideas:

Mashed Potatoes
Rice or Egg noodles
Roasted Vegetables
Crusty Bread

Storage

This is a great dish to enjoy the next day, too. If you have leftovers, store them in an airtight container in the fridge for up to 4 days. Reheat gently in the oven at 350°F until chicken is warm and cheese is melty. You can also reheat in the microwave, in a pinch.

We don’t recommend storing leftovers in the freezer, as freezing and thawing can effect the texture of the cheese.

plated serving of french onion chicken with potatoes and broccoli. Pot of french onion chicken on cutting board in background.

FAQs

What are the best types of onions for caramelizing?

Yellow onions are best for this recipe. They’re savory with a traditional flavor, and can hold their structure when cooked low and slow during caramelization. Vidalia onions are also a nice choice with a sweeter, more mellow flavor.

Can I use chicken thighs instead of breasts?

Definitely! Thighs are super tender, extra juicy, and almost impossible to overcook. They’re a delicious alternative to chicken breasts.

How can I keep the chicken juicy?

Pounding the chicken to an even thickness before cooking will ensure you don’t need a super long cook time, which can dry the chicken out. And be sure the chicken is nestled in nicely with the caramelized onions and sauce. If you need to add an extra splash of broth, go for it.

Can this chicken be baked instead of cooked on the stove?

Sure. You’ll still want to sear the chicken and build the caramelized onion sauce on the stovetop though. Once you do that, you can place the skillet in a 350° oven until the chicken is cooked through, about 10-15 minutes. Add the cheese during the last few minutes of cooking and broil so it gets super melty and bubbly.

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