Easy One Pan French Onion Chicken Bake
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This French onion chicken bake is a savory, comforting dish that combines the rich flavors of classic French onion soup with juicy chicken thighs. With caramelized onions, melty cheese, and a savory cream-based sauce, it’s the perfect recipe for a delicious meal your whole family will love.
Made in one oven-safe skillet, this French onion chicken bake is perfect for a cozy family dinner or an easy weeknight meal. Serve it with mashed potatoes, rice, noodles, or crusty bread to soak up every bit of the delicious onion sauce.
Why You’ll Love This Recipe
- One-pan dinner: The onions, chicken, and creamy sauce are prepared in the same oven-safe skillet for less cleanup.
- Classic French onion flavor: Slowly caramelized onions give this chicken its signature sweet and savory flavor.
- Rich and comforting: Creamy sauce and melted cheese turn simple chicken thighs into a cozy dinner.
- Easy to customize: Try chicken breasts, swap the cheese, or use beef broth for an even deeper French onion flavor.
If you have onions that need to be used, making French Onion Chicken is the perfect way to use that produce before it spoils.
Ingredients for french onion chicken casserole
- Chicken thighs – Bone-in chicken thighs stay juicy and flavorful while baking. Boneless thighs or chicken breasts can also be used, but cooking times may vary.
- Onions – Yellow onions are a great choice because they become wonderfully sweet and savory as they slowly caramelize.
- Butter/olive oil – Using a combination of both gives the onions plenty of flavor while helping them cook evenly. I do this with many dishes and it really makes a difference.
- Seasonings – Italian seasoning, garlic powder, smoked paprika, salt, and pepper add plenty of flavor to the chicken.
- Garlic – Garlic paste is convenient and blends easily into the caramelized onions. Minced fresh garlic can be substituted.
- Broth – Chicken or vegetable broth works well, but beef broth is a great option if you want a deeper flavor reminiscent of traditional French onion soup.
- Heavy cream – Use the real thing to create the rich, silky sauce that surrounds the chicken and onions.
Equipment and kitchen tools
- Cast iron skillet (or oven-safe skillet)
How to make this French Onion Chicken recipe
Step 1 – Caramelize the onions. Melt the butter with olive oil in a large oven-safe skillet. Add the sliced onions and seasonings and cook slowly, stirring occasionally, until the onions are soft, golden, and caramelized.
Step 2 – Season the chicken. While the onions cook, season both sides of the chicken thighs with salt, pepper, garlic powder, and smoked paprika. Season and sear the chicken on both sides until golden brown.
Step 3 – Make the creamy sauce. Pour the broth into the skillet and scrape up the flavorful browned bits from the bottom. Add the heavy cream and simmer until the sauce begins to thicken.
Step 4 – Return the chicken to the skillet and spoon the caramelized onions over the top. Sprinkle with cheese. Transfer the skillet to the oven and bake until the chicken reaches 165°F internally and the cheese is melted and bubbly.
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Step 5 – Add a little more cheese for the last 10 minutes of baking.
Tips for the Best Results
- Caramelize the onions properly: Cook the sliced onions over medium-low heat, stirring every 10 minutes to achieve that jam-like consistency. Be patient—this step adds so much flavor!
- Use a large skillet or oven-safe skillet: This ensures even cooking and makes it easy to transfer from stovetop to oven.
- Sear the chicken thighs: Searing the sides of the chicken on medium-high heat helps to lock in the juices and adds a nice golden brown crust before baking.
- Deglaze with white wine: For an extra layer of flavor, consider adding a little bit of white wine like Sauvignon Blanc or Pinot Grigio when deglazing the bottom of the pan.
- Check the internal temperature: Ensure the chicken reaches an internal temperature of 165°F to guarantee it’s fully cooked.
- Save your onions: When your onions are starting to get overripe, slice them up and freeze them for later use. This will help you save time on busy nights and will prevent waste at the same time.
- Use a baking dish: If you don’t have a cast iron, you could use a large skillet up until the cream sauce is thickened. Pour into a baking dish, add chicken, onions, and cheese, and bake in the oven for 20–25 minutes.
- Cook the onions low and slow: As the onions are cooking, we want this to be low and slow so the temperature should not go above medium high. My fire was on a 3.5 on a gas stove.
- Homemade Italian seasoning: It’s just equal parts of five key Italian spices. You can use fresh or dried basil, oregano, marjoram, thyme, and rosemary. Mix and store in an airtight jar to use as needed. Since the spices are each different sizes and weights, give the mix a good shake before using each time.
Substitutions and Variations
- Chicken: If you prefer white meat, swap the thighs for boneless skinless chicken breasts or tender chicken breasts. You can also try pork chops as a tasty alternative.
- Cheese: While mozzarella is called for, you can elevate the flavor with Gruyere cheese or Swiss cheese, perfect for those who love the rich flavors of classic French onion soup.
- Onions: While yellow onions are the go-to, you can also use white onions or sweet onions like Vidalia for a slightly different taste.
- Broth: Swap the chicken broth for low-sodium beef broth for a deeper, savory flavor similar to classic French onion recipes.
FAQs
Yes, leftover chicken can be used. Simply skip the searing step and bake the chicken with the sauce and onions until warmed through.
Store any leftover French Onion Chicken Bake in an airtight container for up to 3-4 days. Reheat in the oven or microwave.
Absolutely! You can prep the caramelized onions and sear the chicken a day ahead. Store them separately in plastic wrap or an airtight container, then assemble and bake when ready.
Pair this chicken dish with mashed potatoes, green beans, or a crusty bread to soak up all the savory broth and caramelized onion sauce.
Yes, you can adapt this easy French onion chicken bake for the slow cooker by layering the onions, seared chicken, and sauce, then cooking on low for 5-6 hours.
Not really. The whole point of French Onion anything is to have the amazing flavor of a slowly caramelized onion as the base of the dish. You can sauté onions on higher heat and get faster results, but the flavor will be meh. Or even worse, taste burned.
Yes, you can use regular paprika. If you can remember to grab some smoked paprika next time you are at the store, the smoked variety really does add an extra dimension to the spice and the dish. But in a pinch, it’s better to use what you have than to not cook at all.
What to Serve With French Onion Chicken
French onion chicken pairs especially well with mashed potatoes, egg noodles, rice, or crusty French bread to soak up the creamy caramelized onion sauce
More delicious chicken recipes
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French Onion Chicken Recipe
Equipment
- Large Cast Iron Skillet
- knife
Ingredients
- 2 large onions thinly sliced
- 2 tablespoon butter
- 2 tablespoon olive oil
- 4 bone-in thighs
- 2 teaspoon Italian seasoning
- 2 teaspoon garlic powder
- 1 teaspoon black pepper
- 1 teaspoon salt
- 1 teaspoon smoked paprika
- 1 teaspoon garlic paste
- 1/4 cup vegetable or chicken broth
- 1/2 cup heavy cream
- 1/2 cup shredded Gruyère or Swiss cheese
Instructions
- Melt butter in a large pot over low heat.
- Add thinly sliced onion to a pan of melted butter and oil.
- Season with Italian seasoning, salt, and pepper and let them caramelize for 25-30 mins over medium heat (stirring every ten mins)
- Season chicken thighs with salt, pepper, garlic powder, and smoked paprika on both sides and set aside.
- Once onions have caramelized, add in garlic paste and stir. Be sure to cook for an additional 2-3 minutes
- Remove caramelized onions from pan and set aside.
- Add in 1-2 teaspoons of olive oil and sear chicken thighs for about 5 minutes on both sides.
- Remove from pan and let rest.
- Deglaze the pan with broth and heavy cream.
- Let the sauce thicken for about 5 mins
- Add chicken thighs to the pan, top with onions and a little shredded cheese.
- Place in a 425 degree oven for 15-20 min or until chicken is fully cooked through
- Add more cheese at the 10 min mark and let cook the remaining 10 minutes.
Notes
- Don’t rush the onions. Low, slow cooking gives them the deep, sweet flavor that makes this dish taste like French onion soup.
- Check the chicken temperature. Chicken is done when the thickest portion reaches 165°F.
- Try Gruyère or Swiss. Either cheese gives the chicken a more traditional French onion soup flavor.
Nutrition
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Looks like a fabulous dinner idea!