French Onion Chicken Bake

This French Onion Chicken recipe is a keeper! Onions are quickly caramelized on the stove top, before nestling in some chicken, veggies and baked with some optional cheese for an amazing weeknight dinner. It’s gluten-free and only needs about 25 minutes of hands-on cooking. 

French onion chicken in a a skilletFrench Onion Chicken Recipe

We are big fans of French Onion Soup, but we’ve never been big fans of how labor intensive the dish is or how long it takes (which is why we have a recipe for a slow cooker version). But this French Onion Chicken Bake? It’s like the best of both worlds; all that French Onion Soup flavor in a a heartier convenient weeknight dinner format. We also skipped the bread on this one and rely on perfectly cooked juicy chicken breasts to eat up all that caramelized onion flavor. The cheese is optional here, but highly encouraged. To make it a complete meal you can add in either diced potatoes to the bake, or keep it low-carb and use cauliflower florets instead.

Let’s Talk Caramelized Onions

Traditionally, caramelized onions are cooked over a low flame for a long period of time. The water is slowly cooked out of the onions and you are left with a sweet, jam-like consistency. Because we wanted this to be a weeknight dinner that still has all that caramelized onion goodness we’re making “quick” caramelized onions.

To make quick caramelized onions, begin by slicing the onions thin and giving them a 5-minute undisturbed sear at medium-high. The onions will be brown in spots and will start to sweat. You then lower the heat to medium low and cook down for 10-15 minutes, stirring occasionally. The onions should be light brown and be fully softened. This is the stage where you want to deglaze the pan with beef broth and dijon mustard and scrape up any of those browned bits from the onions to help give the dish that characteristic dark look. At this point you’ll add in the remaining ingredients and then place the whole dish into the oven to bake for another 20 minutes. The onions will continue to cook and become sweet and jammy. 

French onion chicken skilletFrench Onion Chicken Ingredients

Added Vegetable Options

To make this a complete meal we added in the option to include either potatoes or to keep it low-carb cauliflower florets. They are mixed together with the onions before being added to the oven to bake. Other vegetables could work too here, so long as they cook in about the 20 minutes it takes for the chicken to cook through.

French onion soup chicken casserole on a plateWhat temperature should chicken be cooked in the oven?

The safe temperature for chicken to be cooked to is 165ºF. However chicken will continue to cook for a few minutes after it has been pulled out of the oven so it’s a safe bet to pull out the chicken a few degrees before it hits that temperature. The surest way to know if a chicken breast is cooked through is to use an instant read thermometer. Insert it into the thickest part of the chicken breast and wait about 3 seconds for it to read the degree. We pull our chicken breasts out at 160º and then let the dish sit, lightly covered with tinfoil for 5-10 minutes so the chicken can rest.

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5.0 rating
3 reviews

French Onion Chicken Bake

This French Onion Chicken recipe is a keeper! Onions are quickly caramelized on the stove top, before nestling in some chicken, veggies and baked with some optional cheese for an amazing weeknight dinner. It's gluten-free and only needs about 25 minutes of hands-on cooking. 

Yield 4
Prep Time 10 minutes
Cook Time 40 minutes
Total Time 50 minutes
Recipe Type: Dinner
Cuisine Gluten-free
Difficulty: Moderate
Author: Lexi's Clean Kitchen
Scale This Recipe



  1. Preheat oven to 400ºF.
  2. Heat butter and oil over medium high heat in a large oven safe skillet (12 inches or more, see note). Add onions and cook undisturbed for 5 minutes, until onions start to sweat and have browned in places. Reduce heat to medium low, add salt and and cook for an additional 10-15 minutes, stirring occasionally, until the onions have softened. Add garlic and thyme and cook for an additional 2 minutes. Add in beef stock and mustard and scrape up any browned bits and continue to cook until the liquid has reduced by about half, about 2 minutes.
  3. Set aside ½ cup of the onion mixture. Add the cauliflower to the skillet and mix together with the onions.
  4. Season the chicken with salt and pepper then nestle the chicken in the skillet. Divide the set aside onions on top of the chicken.
  5. Place in the preheated oven and bake until chicken is cooked through, about 20 minutes. 
  6. Preheat the broiler. Sprinkle the shredded cheese on top of the chicken and place under the broiler until the cheese is melty, about 1 minute.
  7. Remove thyme sprigs and serve.

Recipe Notes

  1. We kept this low carb by using cauliflower, but if desired you can use halved baby potatoes (about 1”) in place of the cauliflower. Or, if you wanted to make this dish as just the chicken bake, omit the cauliflower all together. 
  2. If you do not have a big enough oven safe skillet, you can bake this in a 9x13” oven safe dish.


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French Onion Chicken Bake

This Grilled Chicken and Vegetables recipe with Tomato Vinaigrette is loaded with perfectly grilled chicken, tons of grilled veggies (whatever vegetables you wish, really), and a delicious tomato-based vinaigrette dressing. It’s the perfect way to throw together dinner without turning the oven on!

Grilled Chicken and Vegetables with Tomato Vinaigrette

Grilled veggies, perfectly grilled chicken, and my favorite dressing… Dinner is SERVED! The summer is great for so many reasons but one of my favorites is because of the abundance of vegetables available right from the farm. This salad is the best example I know of a summer vegetable bounty. I love how the grilled chicken and veggies are tied together with this savory tomato vinaigrette. This meal is totally customizable based on what vegetables are available to you and is sure to be a new family favorite.

Tips for Grilling Chicken

  1. Marinate your meat! Any meat that has had a change to be infused with flavor will taste better and be juicier (thanks to the addition of salt).
  2. Prep your grill: Make sure your grill is preheated and that the grates are clean! You want to make sure the grill has come up to the proper temperature. Cleaning the grates will ensure your chicken doesn’t stick. Right before you cook you can rub a little oil on your grates as well!
  3. Cook over indirect heat: While you want your grill to be preheated you do not want to cook over direct flame. Cooking over indirect flame will ensure the chicken doesn’t burn before it is cooked through inside.
  4. Cover your grill! Covering your grill will make sure the grill stays hot and that your food cooks quicker.
  5. Use a thermometer! Sure there are plenty of other tricks to figure out if your chicken is properly cooked, but the most fool proof is to use an instant read thermometer. You want it to read 165º in the thickest part of the chicken.

Can I make it without a grill?

Yes! While we love the charred smoky taste of the grill, this dish would still be perfectly acceptable on a grill pan inside of even if you need to, in a regular skillet! Do what works for you, either way a nice marinated juicy piece of chicken will be delicious with all these veggies and tomato vinaigrette.

If you like this grilling recipe, check out these others:

If you like this chicken and veggie recipe, check out these others:

5.0 rating
1 reviews

Grilled Veggie & Grilled Chicken Salads with Tomato Vinaigrette

Yield 2
Prep Time 10 min
Cook Time 20 min
Total Time 30 minutes

Author: Lexi
Scale This Recipe


    For the chicken

    For the veggies

    For the Tomato Vinaigrette


    • Toss chicken in extra virgin olive oil and spices, set aside
    • Cut veggies and toss in oil and salt, set aside
    • Spray the grill and heat to 350 400 degrees
    • Place the chicken breasts on one side
    • On the other side place a layer of greased tin foil and place the veggies on top
    • Cook for about 7-8 minutes then flip over
    • Cook veggies until desired softness, and cook chicken until fully cooked
    • Make the dressing by combining ingredients in your high-speed blender and blending until smooth
    • Taste and adjust spices as needed
    • Serve with veggies warm or hot over a bed of spinach!


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