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Creamy chicken and onions topped with toasted bread and melted cheese being scooped up with a metal spoon.

French Onion Chicken Bake (One-Pan)

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Made with rotisserie chicken, caramelized onions, cheese, and baguette, this easy French onion chicken bake is a cozy one-pan comfort dinner.
Course dinner, Main Course
Cuisine American, French
Keyword baked, chicken skillet, comfort food, easy, French onion chicken skillet, one pot
Prep Time 5 minutes
Cook Time 45 minutes
Total Time 49 minutes
Servings 6 servings
Calories 420

Equipment

Ingredients

  • 1 tablespoon olive oil
  • 1 tablespoon butter
  • 3 medium yellow onions, thinly sliced into half moons
  • ¾ teaspoons kosher salt, divided
  • ¼ teaspoon freshly ground black pepper
  • 1 tablespoon balsamic vinegar
  • 1 teaspoon Worcestershire sauce
  • 1 teaspoon brown sugar
  • 1 teaspoon dried thyme
  • 1 cup beef broth
  • 4 tablespoons cream cheese (about 2-oz)
  • 3 cups cooked shredded or diced chicken, such as from a rotisserie chicken

To Add at The End

  • 1 cup grated gruyere cheese see notes
  • 1 medium French baguette (about 8-oz loaf), sliced into ½-inch rounds

Instructions

  • Heat the oven to 375F.
  • Heat a large, high-sided, oven-proof skillet over medium-high heat. Add the olive oil, butter, onions, ½ teaspoon salt and pepper, stirring to combine.
  • Cook until browned and caramelized, stirring frequently, about 10 minutes. If the onions are browning too quickly, turn the heat down to medium. If the pan starts to dry out, add a splash of water.
  • Once the onions are caramelized, add the balsamic vinegar, worcestershire sauce, brown sugar, and thyme. Cook for 1 minute, stirring frequently.
  • And add the stock and cream cheese. Stir until the cream cheese is fully incorporated into the sauce. Turn off the heat and add the chicken, stirring to combine. If the pan seems dry, add ¼ cup more chicken stock. You want the mixture to be loose, but not soup consistency.
  • Smooth the chicken onion mixture into an even layer, then place the baguette slices on top in an even layer. You want the slices to be as close together as possible without overlapping. Sprinkle the grated cheese over the top.
  • Cover tightly with foil and bake for 10-20 minutes, or until bubbling around the edges. Uncover and bake for an additional 5 minutes, or until golden. Allow to cool for 5 minutes, then serve.

Notes

  • Perfect caramelization: Keep the heat at medium-high and stir frequently to get those onions perfectly browned without burning. Add a splash of water if the pan starts to dry out.
  • Cheese options: Gruyère is classic, but feel free to use Swiss, Jarlsberg, or even mozzarella for a melty topping.

Nutrition

Serving: 1 (of 6) | Calories: 420kcal | Carbohydrates: 28g | Protein: 30g | Fat: 21g | Saturated Fat: 9g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 7g | Cholesterol: 91mg | Sodium: 784mg | Potassium: 412mg | Fiber: 2g | Sugar: 6g | Vitamin A: 434IU | Vitamin C: 4mg | Calcium: 306mg | Iron: 3mg
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