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5.0 from 3 votes

French Onion Chicken Bake

This easy French Onion Chicken Bake is a fun twist on the classic soup. Juicy, tender chicken breasts are infused with the flavors of French onion soup, like caramelized onions, beef broth, and melted gruyere cheese. It's a delicious meal that tastes like it was cooked all day, but only takes about an hour.

Prep Time
10 mins
Cook Time
10 mins
Total Time
50 mins
Servings: 6
Calories: 379 kcal
Course: Main Course
Cuisine: French

Ingredients

  • 1 tablespoon olive oil
  • 3 tablespoon butter
  • 4 large onions sliced
  • ½ cup low sodium beef broth
  • 2 tablespoon balsamic vinegar
  • 1 tablespoon Worcestershire sauce 
  • 1 teaspoon garlic powder
  • ½ teaspoon kosher salt
  • ½ teaspoon black pepper
  • 1 tablespoon fresh thyme or 1 teaspoon dried thyme
  • 4 boneless skinless chicken breasts
  • 2 cups gruyere cheese grated

Instructions

    Cup of Yum
  1. Peel the onions, cut in half, and slice into thin half-moons
  2. In a large skillet over medium-high, heat the olive oil and melt butter until foamy.
  3. Add sliced onion and cook, stirring occasionally, until they start to turn golden brown, around 15 minutes.
  4. Stir in the beef broth, balsamic vinegar, and Worcestershire sauce. Continue to cook until liquid is reduced, about 5 minutes. Remove from heat.
  5. Stir in the garlic powder, salt, pepper, and thyme.
  6. Preheat oven to 400°
  7. Use butter or olive oil to grease a 9" x 13" baking dish.
  8. Spread half of the caramelized onions on the bottom of the baking dish.
  9. Arrange the chicken breasts evenly over the onions in the baking pan and season them with salt and pepper.
  10. Top the chicken with the remaining caramelized onions.
  11. Top the chicken and onions with the shredded cheese.
  12. Bake 30-40 minutes, until chicken is cooked to an internal temperature of 165°

Notes

  • Use a different cut. Instead of chicken breast, try boneless skinless chicken thighs or tenders.
  • Temp the chicken. The easiest way to know when the chicken breasts are done is to probe them with an instant-read thermometer. Chicken is fully cooked when it reaches 165°.
  • Add some Parmesan. To add a little extra saltiness, sprinkle some grated Parmesan cheese over the gruyere before baking.
  • Boost the flavor. For an extra depth of flavor, deglaze the bottom of the pan with a little white or red wine to pull up all those flavorful browned bits and infuse them into the sauce. 
  • Make it one pan. To make clean up easy, I sometimes make this delicious French onion chicken bake in an oven-safe skillet that can go from stovetop to oven. (like a cast iron pan).
  • Storage. Allow the casserole to cool to room temperature, then transfer to an airtight container and store in the fridge for 3-4 days. 
  • To freeze. The leftovers can be frozen in freezer-safe containers, then thawed, and reheated. 

Nutrition Information

Serving 1g Calories 379kcal (19%) Carbohydrates 9g (3%) Protein 30g (60%) Fat 24g (37%) Saturated Fat 13g (65%) Polyunsaturated Fat 2g Monounsaturated Fat 8g Trans Fat 0.2g Cholesterol 112mg (37%) Sodium 718mg (30%) Potassium 507mg (14%) Fiber 1g (4%) Sugar 4g (8%) Vitamin A 675IU (14%) Vitamin C 9mg (10%) Calcium 477mg (48%) Iron 1mg (6%)

Nutrition Facts

Serving: 6Serving

Amount Per Serving

Calories 379

% Daily Value*

Serving 1g
Calories 379kcal 19%
Carbohydrates 9g 3%
Protein 30g 60%
Fat 24g 37%
Saturated Fat 13g 65%
Polyunsaturated Fat 2g 12%
Monounsaturated Fat 8g 40%
Trans Fat 0.2g 10%
Cholesterol 112mg 37%
Sodium 718mg 30%
Potassium 507mg 11%
Fiber 1g 4%
Sugar 4g 8%
Vitamin A 675IU 14%
Vitamin C 9mg 10%
Calcium 477mg 48%
Iron 1mg 6%

* Percent Daily Values are based on a 2,000 calorie diet.