Step 1: Caramelize the Onions
- Heat 3 tbsp butter and 2 tbsp olive oil in a large skillet over medium heat. Add the sliced onions and stir to coat them in the fat.
- Sprinkle with 1 tsp sugar and ½ tsp salt, which helps to enhance the sweetness and draw out moisture.
- Cook the onions slowly, stirring occasionally, for 25-30 minutes until they are golden brown and caramelized. Reduce heat slightly if they begin to stick or burn. Set aside.
Step 2: Prepare the Chicken
- Preheat your oven to 375°F (190°C).
- Pat the 4 chicken breasts dry with paper towels. Season both sides with garlic powder, onion powder, dried thyme, salt, and pepper.
- Heat a drizzle of olive oil in a large, oven-safe skillet over medium-high heat. Sear the chicken breasts for 2-3 minutes per side until golden brown. Remove from the skillet and set aside.
Step 3: Make the Sauce
- To the same skillet, add 1 cup beef broth and 1 tbsp Worcestershire sauce. Stir to deglaze the pan, scraping up any browned bits from the bottom.
- Return the caramelized onions to the skillet and simmer for 2-3 minutes, allowing the flavors to meld.
Step 4: Assemble the Bake
- Place the seared chicken breasts back into the skillet, nestling them into the onion mixture.
- Spoon the onions over the chicken to coat them evenly.
Step 5: Add Cheese and Bake
- Sprinkle 1 cup shredded Gruyère (or Swiss) cheese and ½ cup Parmesan cheese evenly over the chicken and onions.
- Transfer the skillet to the preheated oven and bake for 20-25 minutes, or until the chicken is fully cooked (internal temperature of 165°F/74°C) and the cheese is melted and bubbly.
Step 6: Garnish and Serve
- Remove the skillet from the oven and garnish with fresh thyme or parsley. Let the dish rest for 5 minutes before serving.
- Serve hot with your favorite sides, such as mashed potatoes, rice, or a fresh green salad.
Tips for Success:
- Onions: Patience is key when caramelizing onions. Low and slow heat brings out their natural sweetness.
- Cheese Options: For an extra gooey and rich dish, feel free to add more cheese or mix varieties.
- Make Ahead: You can caramelize the onions a day ahead and store them in the refrigerator to save time.
Conclusion:
This French Onion Chicken Bake combines the classic flavors of French onion soup with hearty, juicy chicken for an unforgettable meal. It’s easy enough for weeknights yet elegant enough for special occasions. Every bite is loaded with savory, cheesy goodness—perfect for satisfying your comfort food cravings!