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.
Why You’ll Love This Recipe
- Complete meal: Serve with crusty bread, mashed potatoes, or green beans for a well-rounded dinner.
- Rich flavors of French onion soup: caramelized onions add that sweet, savory taste you love from your favorite soup.
- Juicy chicken: The chicken thighs remain tender and flavorful after being seared and baked to golden brown perfection.
- Easy to make: With just one pan, it’s an easy dinner recipe, perfect for busy weeknights.
- Ultimate comfort food: The creamy sauce and melted cheese create a mouthwatering dish that’s sure to become a family favorite.
- Versatile: This recipe works with chicken thighs, breasts, or even pork chops if you’re looking for a variation.
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
- Onions. Thinly sliced onions form the foundation for this dish.
- Butter.
- Olive oil.
- Bone-in chicken thighs. You can use boneless, but bone-in has really great flavor.
- Italian seasoning.
- Garlic powder.
- Black pepper.
- Salt.
- Smoked paprika. It gives the dish a nice color.
- Garlic paste.
- Vegetable or chicken broth. You could also use stock.
- Heavy cream. Sometimes called heavy whipping cream, this takes the sauce over the top.
- Mozzarella cheese. Shredded.
Equipment and kitchen tools
- Cast iron skillet (or oven-safe skillet)
How to make this easy recipe
- Sautee the onions low and slow in a cast iron skillet.
- Coat and sear the chicken.
- Make the sauce, deglazing the pan.
- Bake for twenty to twenty five minutes.
Check the recipe card below for the full recipe and ingredient measurements.
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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.
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French Onion Chicken Recipe
Equipment
- Large Cast Iron Skillet
- knife
- cutting board
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 mozzarella 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 carmelize 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 carmelized 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 mozzarella cheese.
- Place in a 450-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.
Looks like a fabulous dinner idea!