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French onion chicken bake topped with melted cheese, caramelized onions, parsley, and herbs in a rich brown pan sauce inside a white casserole dish.
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French Onion Chicken Bake

French Onion Chicken Bake is an easy chicken dinner made with tender chicken breasts, caramelized onions, savory beef broth, and melted Swiss cheese.
Course Main Course
Cuisine American
Keyword chicken
Prep Time 10 minutes
Cook Time 1 hour
Total Time 1 hour 10 minutes
Servings 4
Calories 403kcal
Author Stacie Vaughan

Ingredients

  • 4 boneless, skinless chicken breasts
  • 2 tbsp extra virgin olive oil
  • 3 large sweet onions thinly sliced
  • 1 tbsp brown sugar
  • 1 tbsp balsamic vinegar
  • 1 cup beef broth
  • 1 tsp dried thyme
  • salt and pepper to taste
  • 1 ½ cups shredded Swiss cheese
  • chopped fresh parsley for garnish, optional
US Customary - Metric

Instructions

  • Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish.
  • Heat oil in a skillet over medium heat. Add onions and a pinch of salt. Cook for 10 to 15 minutes until soft and translucent.
  • Sprinkle on brown sugar. Reduce the heat to medium-low. Cook 15 to 20 minutes, stirring often, until brown and caramelized.
  • Stir in balsamic vinegar, beef broth, thyme, salt, and pepper. Simmer 3 minutes.
  • Place chicken in the baking dish and pour the onion mixture over the top.
  • Cover with foil and bake for 25 minutes.
  • Remove foil, add cheese, and bake uncovered 10 more minutes until bubbly.
  • Sprinkle with parsley if desired and serve hot.

Notes

  • Slice the onions thinly so they cook down evenly and caramelize faster.
  • Don’t rush the onions. This step gives the chicken most of its French onion flavor.
  • If your chicken breasts are very thick, pound them to an even thickness or slice them into cutlets so they cook evenly.
  • Chicken is fully cooked when it reaches 165°F in the thickest part.
  • For the best flavor, use beef broth, but chicken broth can work in a pinch.
  • Gruyère can be used instead of Swiss for a more classic French onion soup flavor.
  • Serve with garlic bread if you want that French onion soup bread element.

Nutrition

Calories: 403kcal | Carbohydrates: 12g | Protein: 37g | Fat: 23g | Saturated Fat: 9g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 9g | Trans Fat: 0.01g | Cholesterol: 110mg | Sodium: 435mg | Potassium: 610mg | Fiber: 1g | Sugar: 7g | Vitamin A: 381IU | Vitamin C: 8mg | Calcium: 397mg | Iron: 1mg
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