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Keto French Onion Chicken

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This Keto French Onion Chicken Recipe is a delicious is the perfect low carb comfort food recipe. Pan-seared chicken , simmered in a rich and flavorful pan sauce made with caramelized onions, sherry, and fresh herbs, then topped with melty mozzarella and Gruyere cheeses. The dish is finished with a sprinkle of fresh thyme and served with a creamy cauliflower mash and roasted broccoli. This easy weeknight recipe is sure to be a family favorite.

An enameled cast iron skillet with cooked chicken breasts, topped with a caramelized onion pan sauce and melty cheese.
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Ingredients in Low Carb French Onion Chicken

Ingredients all laid out in individual bowls to make a skillet French onion chicken recipe

Ingredients Notes

  • Chicken: For this skillet French onion chicken recipe you can use boneless skinless chicken thighs or breasts. It is also delicious made with pork. (More Keto Chicken Recipes)
  • Onion: The key to an extra flavorful sauce is to caramelize the onions. Fully caramelizing onions takes about 30 minutes, but the end result is worth it. They taste incredible. (Try this Caramelized Onion and Bacon Dip Recipe)
  • Worcestershire sauce: If you do not have Worcestershire sauce or do not like the flavor, you could also substitute soy sauce or coconut aminos. Depending on which substitution you make, it may be necessary to adjust the salt levels.
  • Garlic: Fresh is best, but if you do not have any fresh garlic on hand, you can use 3 teaspoons jarred minced garlic, 1 ½ teaspoons garlic powder, or 1 tablespoon of dried minced garlic.
  • Thyme: Again, fresh is best when it comes to this low carb French onion chicken recipe, but dried will work also. As a rule of thumb, 1 teaspoon of dried herbs is equal to 1 tablespoon of fresh herbs.
  • Beef stock: For this recipe you can use either beef stock or chicken stock. Both will work just fine.
  • Cheese: I used shredded mozzarella and gruyere, but you can use any cheese you prefer. Some of my other favorites are Swiss, gouda, cheddar, or provolone.

How to Make The Best French Onion Chicken Recipe

Step by step photos for how to make a French onion chicken skillet recipe.

Step by Step Instructions

STEP 1: Lightly season the chicken breasts with salt and pepper on both sides.

2: In a large skillet over medium-low heat, add 2 tablespoons of the butter, the onions and the garlic. Cook until the onions are nice and caramelized, about 30 minutes. Remove the onions from the pan and set aside.

3: Increase the heat to medium-high, add the remaining 2 tablespoons of butter and pan-sear the chicken on both sides until they are a deep golden brown.

4: Remove from pan and set aside. (Chicken will not be fully cooking during this stage) De-glaze the pan with stock. Using a rubber spatula, scrape up and mix in any remaining bits of chicken stuck to the bottom of the pan. Let simmer for 3 to 5 minutes.

5: Reduce the heat to medium-low to low, add the cooking sherry, garlic, Worcestershire, thyme, salt and pepper. Let simmer for 6 minutes, or until the sauce has reduced by half and thickened slightly. 

6: Add caramelized onions back to the pan and nestle in the chicken, and simmer until the chicken is cooked all the way through, about 10 minutes or until it has reached an internal temperature of 165°F.

7: Spoon the onions and some sauce over the chicken and then top with a combination of gruyere and mozzarella cheese. Bake in the oven for 7 to 8 mins at 275°F or until the cheese is melted and bubbly.

8: Spoon a little bit of onion gravy on top and garnish with fresh thyme.

An enameled cast iron skillet with cooked chicken breasts, topped with a caramelized onion pan sauce and melty cheese.

Recipe Tips and Variations

  • Storage: Store leftover Keto French Onion Chicken in the refrigerator for up to 4 days.
  • Reheating: You can reheat this dish in a pan on the stovetop or in the microwave.
  • Thickening the sauce: If you would like the sauce to be thicker, you can add a little xanthan gum, tapioca flour or arrowroot flour.
  • Slow cooker: To make this recipe in a crockpot, add all ingredients except for the cheese and cook on low for 4 to 6 hours. Sprinkle the cheese over top and cook for one additional hour.
  • Serving suggestions: I like to serve this with Herbed Goat Cheese Cauliflower Mash and Sheet Pan Roasted Broccoli or Cheesy Garlic Roasted Asparagus
A white bowl with French onion chicken on top of cauliflower mash, served with steamed broccoli.

Frequently Asked Questions

Can I use chicken thighs instead of chicken breasts for this recipe?

Yes! You can use boneless, skinless chicken thighs in place of the chicken breasts.

How can I make this a dairy free French onion chicken recipe?

To make this recipe dairy free, you can substitute the butter with ghee or coconut oil, and the cheese with your favorite dairy free cheese alternative.

Is this keto French onion chicken recipe gluten free?

Yes, as written the recipe is naturally gluten free

A serving bowl full of French onion chicken, on top of cauliflower mash, served with broccoli on the side.

What to Serve with Low Carb French Onion Chicken Skillet

An enameled cast iron skillet with cooked chicken breasts, topped with a caramelized onion pan sauce and melty cheese.

More Keto Chicken Recipes

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An enameled cast iron skillet with cooked chicken breasts, topped with a caramelized onion pan sauce and melty cheese.

Keto French Onion Chicken

★★★★★

5 from 3 reviews
  • Author: Kyndra Holley
  • Total Time: 1 hour
  • Yield: 4 Servings 1x
  • Diet: Gluten Free
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Description

This Keto French Onion Chicken Recipe is a delicious is the perfect low carb comfort food recipe. Pan-seared chicken , simmered in a rich and flavorful pan sauce made with caramelized onions, sherry, and fresh herbs, then topped with melty mozzarella and Gruyere cheeses. The dish is finished with a sprinkle of fresh thyme and served with a creamy cauliflower mash and roasted broccoli. This easy weeknight recipe is sure to be a family favorite.

Ingredients

Units Scale
  • 1 ½ pounds boneless, skinless chicken breasts (4 total)
  • 4 tablespoons butter, divided
  • 2 medium onions, thinly sliced
  • ½ cup cooking sherry (I use this brand)
  • 3 cloves garlic, minced
  • 1 tablespoon Worcestershire sauce
  • 1 tablespoon fresh thyme leaves or 1 teaspoon dried thyme, plus extra for garnish
  • 1 teaspoon sea salt
  • ½ teaspoon black pepper
  • 1 cup beef or chicken stock
  • 1 cup shredded mozzarella cheese
  • ½ cup shredded gruyere cheese

Instructions

  1. Lightly season the chicken breasts with salt and pepper on both sides. In a large skillet over medium-low heat, add 2 tablespoons of the butter, the onions and the garlic. Cook until the onions are nice and caramelized, about 30 minutes. Remove the onions from the pan and set aside.
  2. Increase the heat to medium-high, add the remaining 2 tablespoons of butter and pan-sear the chicken on both sides until they are a deep golden brown. Remove from pan and set aside. (Chicken will not be fully cooking during this stage)
  3. De-glaze the pan with stock. Using a rubber spatula, scrape up and mix in any remaining bits of chicken stuck to the bottom of the pan. Let simmer for 3 to 5 minutes.
  4. Reduce the heat to medium-low to low, add the cooking sherry, garlic, Worcestershire, thyme, salt and pepper. Let simmer for 6 minutes, or until the sauce has reduced by half and thickened slightly. 
  5. Add caramelized onions back to the pan and nestle in the chicken, and simmer until the chicken is cooked all the way through, about 10 minutes or until it has reached an internal temperature of 165°F.
  6. Spoon the onions and some sauce over the chicken and then top with a combination of gruyere and mozzarella cheese. Bake in the oven for 7 to 8 mins at 275°F or until the cheese is melted and bubbly. Spoon a little bit of onion gravy on top and garnish with fresh thyme.

Notes

  • Net carbs per serving: 8.4g
  • Storage: Store leftover Keto French Onion Chicken in the refrigerator for up to 4 days. 
  • Reheating: You can reheat this dish in a pan on the stovetop or in the microwave.
  • Thickening the sauce: If you would like the sauce to be thicker, you can add a little xanthan gum, tapioca flour or arrowroot flour.
  • Slow cooker: To make this recipe in a crockpot, add all ingredients except for the cheese and cook on low for 4 to 6 hours. Sprinkle the cheese over top and cook for one additional hour. 
  • Prep Time: 15 minutes
  • Cook Time: 45 minutes
  • Category: Chicken Recipes
  • Method: Saute
  • Cuisine: French

Nutrition

  • Calories: 524
  • Fat: 27g
  • Carbohydrates: 9.2g
  • Fiber: 0.7g
  • Protein: 51g

Keywords: Keto French Onion Chicken, Low carb French Onion Chicken, Caramelized Onion Chicken, Sherry Chicken, Keto Chicken Recipe, Low carb chicken recipe, French Onion Chicken recipe, Comfort food recipe, Keto comfort food, Low carb comfort food, French Onion Chicken casserole, Keto Friendly Chicken dish, Keto French onion soup chicken, Keto diet chicken recipe, Low carb diet chicken recipe, Gluten-free chicken recipe, French onion chicken skillet

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Reader Interactions

Comments

  1. Jessica says

    Made it! Love it! My husband was pleasantly surprised with how much he liked it! I sprinkled some parm cheese and Italian seasoning on top. DELISH!

    ★★★★★

    Reply

  2. Sunny says

    This dish is SO GOOD!! I did it in cast iron so I wouldn't have to switch pans and used chicken thighs. I can't wait to make this for my keto sister next time I go visit!

    ★★★★★

    Reply

  3. Jordan says

    I'm so excited to try this out this weekend!

    I had a question about doing it in a slow cooker. In the instructions it says for everything except the cheese to cook on low for 4-6 hours, then to add the cheese and cook for an additional hour. I just wanted to check and make sure that meant a total of 5-7 hours cooking time, not that the cheese should be added in the final hour of that 4-6 hour window.

    Thanks so much! I have a feeling this is going to be a household favorite!

    Reply

    • Kyndra Holley says

      Hi Jordan, you would add the check and then cook for one additional hour.

      Reply

  4. Teri says

    I just made this for dinner tonight, all I can say is wow, what a flavorful easy dish

    Reply

  5. Donna says

    I made this today Was really good. Both my husband and I enjoyed it. Just wondered when to add the garlic, lol.

    ★★★★★

    Reply

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