Name: French Onion Chicken
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Cuisine: French
Ingredients: 3 tbsp butter; 2 large onions, sliced very thin; 1 cup broth; 4 medium chicken breasts; 1 tsp dried thyme; 1 tsp salt; 1 tsp pepper; 1 tbsp arrowroot powder (or cornstarch); 1 cup grated gruyere cheese (mozzarella works as well)

Why You’ll Love French Onion Chicken Recipe

This recipe is rich, cheesy, and full of deep onion flavor.

It uses simple ingredients but tastes restaurant-worthy.

Everything comes together in under an hour.

It is perfect for weeknight dinners, family meals, or a cozy weekend dish.

The caramelized onions and melted cheese make the chicken extra flavorful and satisfying.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

3 tbsp butter
2 large onions, sliced very thin
1 cup broth
4 medium chicken breasts
1 tsp dried thyme
1 tsp salt
1 tsp pepper
1 tbsp arrowroot powder or cornstarch
1 cup grated Gruyere cheese, or mozzarella

Directions

Preheat the oven to 400°F.

In a large oven-safe skillet, heat 2 tablespoons of butter over medium-high heat.

Add the sliced onions and 1/4 cup broth. Cook for 15 to 20 minutes, stirring occasionally, until the onions are browned, soft, and caramelized.

While the onions cook, pound the chicken breasts until they are even in thickness, about 1 inch thick.

Season both sides of the chicken with thyme, salt, and pepper.

Transfer the cooked onions to a bowl. Add the remaining 1 tablespoon of butter to the skillet, then add the chicken.

Sear the chicken for 5 minutes on each side. Remove the chicken and place it on a plate. Reduce the heat to medium-low.

In a small bowl, whisk together the remaining 3/4 cup broth with the arrowroot powder or cornstarch.

Return the onions to the skillet, then add the broth mixture. Whisk for 2 to 3 minutes, until the sauce thickens.

Turn off the heat. Add the chicken back to the skillet and spoon the onions and sauce over the top.

Sprinkle each chicken breast with grated Gruyere cheese.

Transfer the skillet to the oven and bake for 8 to 10 minutes, or until the chicken reaches an internal temperature of 165°F.

Servings and timing

Servings: 4
Prep time: 15 minutes
Cook time: 40 minutes
Total time: 55 minutes

Variations

Use mozzarella instead of Gruyere for a milder, stretchier cheese topping.

Swap chicken breasts for boneless chicken thighs for a juicier result.

Add mushrooms to the onions for an earthy flavor.

Use beef broth for a deeper French onion flavor, or chicken broth for a lighter taste.

Add a splash of cream to the sauce for a richer finish.

Storage/Reheating

Store leftovers in an airtight container in the refrigerator for up to 3 days.

Reheat in a covered skillet over low heat until warmed through. You can also reheat it in the oven at 325°F until hot.

For microwave reheating, warm in short intervals to avoid drying out the chicken.

Freezing is possible, but the cheese and sauce texture may change slightly after thawing.

FAQs

Can I use chicken thighs instead of chicken breasts?

Yes, boneless chicken thighs work well and usually turn out very tender. Adjust the cooking time as needed.

What kind of broth should I use?

Beef broth gives the dish a deeper French onion flavor, while chicken broth keeps it lighter.

Can I make this without an oven-safe skillet?

Yes. Sear everything in a regular skillet, then transfer the chicken, onions, sauce, and cheese to a baking dish before baking.

Can I use mozzarella instead of Gruyere?

Yes, mozzarella works well, though Gruyere gives a stronger, nuttier flavor.

How do I know when the chicken is fully cooked?

The chicken is done when the internal temperature reaches 165°F.

Can I make this ahead of time?

Yes. You can cook the onions and sear the chicken ahead, then assemble and bake when ready to serve.

Why are my onions not caramelizing?

They may need more time. Cook them over medium to medium-high heat and stir occasionally until soft and golden brown.

Can I add more cheese?

Yes, you can add extra cheese if you want a cheesier topping.

Is arrowroot powder necessary?

No. Cornstarch works as a substitute and helps thicken the sauce.

What should I serve with French Onion Chicken?

It pairs well with mashed potatoes, rice, pasta, roasted vegetables, or a simple green salad.

Conclusion

French Onion Chicken is a comforting and flavorful meal with tender chicken, sweet caramelized onions, savory sauce, and melted cheese. It is simple enough for a weeknight but special enough to serve when you want something warm, rich, and satisfying.