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French Onion Chicken Bake

A cozy comfort dish combining tender chicken, rich beefy flavors, caramelized onions, and gooey melted Gruyère cheese, perfect for chilly evenings and family gatherings.
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: French
Calories: 320
Ingredients Method Notes

Ingredients
  

For the onion mixture
  • 1 tbsp olive oil Choose a good quality olive oil for better flavor.
  • 3 tbsp butter Use room temperature butter for easy melting.
  • 4 large onions, sliced Preferably sweet onions like Vidalia for a hint of sweetness.
  • 1/2 cup low sodium beef broth Homemade is best but store-bought works too.
  • 2 tbsp balsamic vinegar Adds a beautiful depth; use a good quality brand.
  • 1 tbsp Worcestershire sauce Don't skimp on this one; it enhances the savory notes.
  • 1 tsp garlic powder Fresh garlic can also be used if you prefer!
  • 1/2 tsp kosher salt Adjust according to your preference.
  • 1/2 tsp black pepper Freshly ground if possible.
  • 1 tbsp fresh thyme Or 1 tsp dried thyme.
For the chicken and cheese
  • 4 boneless skinless chicken breasts Choose organic or free-range for better taste.
  • 2 cups Gruyère cheese, grated For that melt-in-your-mouth experience; Emmental can also be used.

Method
 

Preparation
  1. Peel the onions, cut them in half, and slice into thin half-moons.
  2. In a large skillet over medium-high heat, add the olive oil and melt the butter until foamy.
  3. Add the sliced onions and cook, stirring occasionally, until they turn golden brown (around 15 minutes).
  4. Stir in the beef broth, balsamic vinegar, and Worcestershire sauce. Continue cooking until the liquid reduces, about 5 minutes. Remove the skillet from the heat.
  5. Stir in the garlic powder, salt, pepper, and thyme until well mixed.
Baking
  1. Preheat your oven to 400°F (200°C).
  2. Grease a 9" x 13" baking dish with butter or olive oil.
  3. Spread half of the caramelized onions on the bottom of the dish.
  4. Arrange the chicken breasts evenly over the onions, seasoning the chicken with a pinch of salt and pepper.
  5. Top the chicken with the remaining caramelized onions and layer the grated cheese generously over the top.
  6. Bake for 30-40 minutes, or until the chicken is cooked through to an internal temperature of 165°F (75°C) and the cheese is bubbly and golden.
  7. If the cheese is browning too quickly, cover the dish with foil for the last few minutes of baking.

Notes

Storage: After baking, let it cool completely before refrigerating. It can last about 3-4 days in the fridge or up to 3 months in the freezer.