French Onion Chicken
If you’ve never tried a French Onion Chicken recipe before, buckle up. This is the juiciest, most flavorful chicken, topped with melty Gruyère and smothered in caramelized onions. Think homemade French onion soup in chicken form. It’s a one-pan, heavenly dinner. Serve with Garlic Mashed Potatoes and Roasted Brussels Sprouts.
What is French Onion Chicken?
French Onion Chicken takes inspiration from classic French onion soup and turns it into a satisfying main dish. Caramelized onions are the star, bringing a natural sweetness that balances the sauce’s savory flavors.
The key is cooking the onions until they’re soft, golden, and deeply caramelized. This takes about 20 to 30 minutes, but the flavor they develop is worth the extra time. Keep the heat low and stir occasionally to help them cook evenly without burning.
Ingredient Notes
Here’s what you’ll need to make French Onion Chicken with a rich onion sauce and cheesy topping.
- Butter: Adds richness to the onions and gives the sauce a smooth, buttery flavor.
- Olive oil: Helps sear the chicken and keeps the butter from burning too quickly.
- Chicken breasts: Pound or slice them to 1/2 inch thick or less for even cooking and tender bites.
- Salt and pepper: Season the chicken and bring out the other ingredients’ flavors.
- Yellow onions: Thin slices cook down until soft, golden, and sweet, creating the classic French onion flavor.
- Dried thyme leaves: Add an earthy, savory note that complements the onions.
- Bay leaves: Add extra depth as the sauce simmers. Remove them before serving.
- Marsala or red wine: Adds richness and deepens the onion flavor.
- Beef broth: Provides a savory base similar to classic French onion soup.
Finishing the Dish:
- Softened butter: Blends with the flour to help thicken the sauce.
- All-purpose flour: Thickens the sauce so it clings to the chicken and onions.
- Grated Gruyère cheese: Melts into a creamy topping with a nutty, slightly salty flavor.
How to Make French Onion Chicken
French Onion Chicken makes an amazing Sunday dinner or special-occasion meal everyone will love. For full details on how to make French Onion Chicken, see the recipe card down below. Here is what you can expect when making this recipe:
Step 1: Cook Chicken
Place a large nonstick pan over medium heat and add 1 tablespoon of butter. Season both sides of the chicken with salt and pepper. Cook until browned and the internal temperature reaches 165°F. Transfer to a plate and cover with foil.
Pro Tip: Pound the chicken breasts to an even thickness before cooking so they cook evenly without drying out.
Step 2: Caramelize Onions
Add the remaining tablespoon of butter and olive oil to the same pan. Stir in the onions, thyme, bay leaves, salt, and pepper, coating everything in the butter and oil.
Cook over medium-low heat for 20 to 30 minutes, stirring occasionally, until the onions are soft, tender, and deeply golden. If they start browning before they soften, lower the heat and continue cooking.
Step 3: Make French Onion Gravy
Once the onions are tender and browned, pour in the Marsala wine to deglaze the pan, scraping up the browned bits from the bottom. Let it reduce by half.
Add the beef broth. In a small bowl, mash the softened butter and flour into a paste. Stir it into the pan and cook for about 1 minute, until the gravy begins to thicken. Reduce the heat to low.
Step 4: Choose Your Wine
Marsala, sherry, or red wine all work in this recipe. Marsala is my favorite here because its slightly sweet flavor pairs beautifully with the caramelized onions. Red wine gives the gravy a deeper, more robust flavor, while sherry adds a dry, nutty note.
Step 5: Return the Chicken to the Pan and Add Cheese
Add in chicken and cover to warm through, about 3 minutes. Add shredded Gruyère cheese to the chicken and cover to melt completely, another minute or two.
Why Gruyere Cheese?
Gruyère cheese is rich, creamy, salty, and nutty; don’t skimp on this ingredient…trust me.
Tips for Success
- Use a wide skillet: A larger cooking surface lets the onions cook evenly instead of steaming in a crowded pan.
- Watch the gravy thickness: Add the butter-flour paste gradually, stirring well between additions, so the gravy stays smooth without becoming too thick.
- Scrape up the browned bits: When adding the wine, loosen the flavorful bits stuck to the pan. They add depth to the gravy.
- Keep the heat low after adding cheese: High heat can make Gruyère oily or grainy. Cover the pan and let the cheese melt gently.
- Taste before serving: After it thickens, check the gravy and adjust the salt and pepper as needed, especially since beef broth and Gruyère can be salty.
- Let the chicken rest briefly: Once the cheese has melted, let the chicken rest for a couple of minutes before serving so the juices settle and the gravy clings to each piece.
What to Serve with French Onion Chicken
I love serving French Onion Chicken with roasted vegetables or a starchy side to soak up every bit of that gravy. Here are some delicious sides that would be good choices alongside a plate of French Onion Chicken:
- Garlic Mashed Potatoes (these are a showstopper)
- Famous Butter Rice (delicious choice)
- Mom’s Potato Rolls
- Roasted Potatoes
The printable recipe card is below. I hope you love this French Onion Chicken as much as we did. That onion gravy and melted Gruyère are so good! Save, print, bookmark, or pin this recipe so you can make it again. Enjoy!
French Onion Chicken
Ingredients
- 2 tablespoons butter divided
- 1 tablespoon olive oil
- 4 chicken breasts pounded or cut to be 1/2 inch thick (or less)
- salt & pepper to taste
- 2 whole yellow onions sliced thin
- 1 teaspoon dried thyme leaves
- 2 bay leaves
- 1/2 cup marsala or red wine
- 1 cup beef broth
Finishing the dish:
- 1 tablespoon butter softened
- 1 tablespoon all purpose flour
- 4 ounces gruyere cheese grated
Instructions
-
Place large, nonstick pan over medium heat heat. Add 1 tablespoon butter to the pan. Sprinkle salt and pepper over both sides of the chicken. Add to the preheated pan and brown on both sides and thoroughly cooked to 165 degrees F. Transfer browned chicken to a plate and cover with foil.
-
To the hot pan, add other tablespoon butter and 1 tablespoon olive oil. Add onions, thyme, bay leaves, salt and pepper to the pan and stir to coat in spices, butter and oil. Cook slowly, stirring occasionally for 20-30 minutes or until completely soft and tender. If your onions are coloring before they are tenderizing, your heat may be too high. Reduce heat and continue cooking.
-
Once onions are completely tender and browned all the way though, deglaze pan with marsala wine and cook down by half (this shouldn’t take too long). Add in the beef broth. In a small bowl, stir butter and flour together to create a paste. Add to pan to thicken the gravy. Stir and cook 1 minute. Reduce heat to low.
-
Add in chicken and cover to warm through, about 3 minutes. Add shredded gruyere cheese to chicken and cover to melt completely, another minute or two.
-
Top chicken with dried parsley and cracked black pepper, if desired and serve hot.
Video
Nutrition
Variations
You can easily change up this French Onion Chicken depending on what you have in the fridge or pantry. Here are a few simple ideas to try.
- Use Swiss cheese: If you can’t find Gruyère, Swiss cheese melts well and works as a good substitute.
- Swap the wine: Dry sherry or red wine works in place of Marsala, each adding its own flavor.
- Leave out the wine: Use extra beef broth instead if you’d rather skip the alcohol.
- Try chicken thighs: Swap the chicken breasts for boneless, skinless thighs, adjusting the cooking time as needed.
- Add mushrooms: Toss sliced mushrooms into the pan with the onions for an extra savory flavor.
More Saucy Chicken Recipes!
If you love a good sauce with your chicken, try these recipes. You can also browse all my chicken recipes for more dinner ideas.
- Chicken Cacciatore
- Chicken Piccata
- Crockpot Honey Mustard Chicken
- Chicken with Mushroom Gravy over Mashed Potatoes
Storage and Reheating
Store leftover French Onion Chicken in an airtight container in the refrigerator for 3 to 4 days. Reheat in the microwave or in a 350°F oven until warmed through.
Can I Freeze French Onion Chicken?
Yes! Let the chicken cool completely, then transfer it to a freezer-safe container and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating in a 350°F oven for 15 to 20 minutes, or until heated through.
If you make this recipe, I would really appreciate it if you would give it a star rating and leave your review in the comments! If you have a picture of your finished dish, post it on Instagram using the hashtag #laurenslatest and tag me @laurens_latest.
