If you love the deep, rich flavor of French onion soup, this French Onion Chicken is going to become one of your favorite comfort food dinners. Juicy bone-in chicken thighs are seasoned simply, seared until golden, then smothered in deeply caramelized onions and a rich beef gravy that brings all those classic French onion flavors together.
Everything gets topped with melty gruyere and mozzarella cheese and baked until bubbly and golden. When that cheese melts down into the onions and gravy, you take one bite and immediately think, OH YEAH OH YEAH THAT’S OFF THE CHAIN!
Serve it over creamy mashed potatoes with roasted asparagus so it can soak up every bit of that incredible onion gravy.
Why You’ll Love This
• Deep caramelized onion flavor just like French onion soup
• Juicy, flavorful chicken thighs
• Rich savory onion gravy
• Melty gruyere and mozzarella cheese topping
• Perfect comfort food dinner
What You’ll Need
Bone-in chicken thighs – These stay juicy while baking and provide great flavor.
Yellow onions – Slowly caramelized until sweet, golden, and deeply flavorful.
Garlic cloves – adds extra flavor to the gravy
Butter – Helps the onions caramelize and adds richness.
Olive oil – Used to cook the chicken until golden.
Beef broth – Creates the rich gravy base that gives this dish its French onion flavor.
Flour – Thickens the onion gravy slightly.
Worcestershire sauce – Adds depth and keeps onions from drying out.
Gruyere cheese – The classic cheese used in French onion dishes.
Mozzarella cheese – Adds extra meltiness and stretch.
Granulated garlic – Brings savory flavor to the chicken.
Smoked paprika – Adds subtle smokiness.
Salt and pepper – Essential seasoning for the chicken and onions. Add to your taste.
How to Make French Onion Chicken
Step 1: Caramelize the Onions
Slice the onions into thin strips. Melt butter in a large skillet over medium-low heat and add the onions with a pinch of salt. Cook slowly, stirring occasionally, until the onions become deeply golden brown and soft. If they begin to dry out, add a splash of Worcestershire sauce or a little water and continue cooking.
Step 2: Season the Chicken
Pat the chicken thighs dry and season them with granulated garlic, smoked paprika, salt, and pepper on both sides. This simple seasoning gives the chicken great flavor while letting the caramelized onions shine.
Step 3: Cook the Chicken
Heat olive oil in a skillet over medium heat. Place the chicken thighs in the pan and cook until golden brown and cooked through. Once done, remove the chicken from the skillet and set aside.
Step 4: Make the Onion Gravy
Once the onions are fully caramelized, add in minced garlic and cook for one minute until fragrant. Sprinkle flour over the onions/garlic and stir to coat them evenly. Slowly pour in the beef broth while stirring to create a rich, savory gravy. Bring gravy to a boil, then lower heat and allow to simmer 3-4 minutes until thickened.
Step 5: Return Chicken to Skillet
Add the cooked chicken thighs back into the skillet and spoon plenty of the caramelized onion gravy over the top so the chicken is well coated.
Step 6: Add the Cheese
Top the chicken generously with gruyere and mozzarella cheese. Make sure the cheese covers both the chicken and the onions.
Step 7: Bake Until Bubbly
Transfer the skillet to a 425°F oven and bake until the cheese is melted, bubbly, and slightly golden.
Tips
• The key to great flavor is slow caramelization of the onions. Don’t rush this step.
• If onions begin sticking or drying out, add a splash of water or broth and continue cooking.
• Broil for the last minute to get it golden brown and charred on top.
• A cast iron skillet works great since it can go straight from stovetop to oven.
FAQs
Can I use boneless chicken thighs?
Yes, absolutely! Legs or breast would work too!
What cheese can I substitute for gruyere?
Swiss cheese, provolone, or mozzarella are good alternatives.
Can I make this ahead of time?
Yes, and reheat in the oven or air fryer!
What should I serve with French onion chicken?
Mashed potatoes, roasted asparagus, green beans, or crusty bread are great options.
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French Onion Chicken
Ingredients
- 5 bone-in chicken thighs
- 3 –4 onions sliced
- 3 cloves garlic minced
- 1 tbsp granulated garlic or garlic powder
- 1 tsp smoked paprika
- salt and pepper to taste
- 1 tbsp olive oil
- 2 tbsp butter
- 2 tbsp flour
- 1 cup low sodium beef broth
- splash Worcestershire sauce
- 1/2 cup gruyere cheese
- 1/2 cup mozzarella cheese
Instructions
- Season chicken thighs with granulated garlic, smoked paprika, salt, and pepper.
- Cook chicken in olive oil in a skillet until golden and cooked through. Remove and set aside.
- Melt butter in a skillet and cook sliced onions with salt until deeply caramelized. Add splash of Worcestershire sauce half way through.
- Add in garlic and cook for one minute. Sprinkle flour and stir.
- Add beef broth and mix to create a gravy. Bring to a boil and then lower heat and allow to simmer and thicken for 3-4 minutes.
- Return chicken to the skillet and spoon onions over the top.
- Top with gruyere and mozzarella cheese.
- Bake at 425°F until cheese is melted and bubbly.
- Serve hot on top of mashed potatoes with asparagus.
