French Onion Chicken Skillet
This French Onion Chicken Skillet delivers all the comforting, savory depth of classic French onion soup in a high-protein, weeknight-friendly format, featuring tender chicken breasts nestled in a rich, caramelized onion sauce and topped with melted cheese.
For 2 servings
Pat chicken breasts dry with paper towels and season generously with 1/2 tsp salt and 1/4 tsp black pepper on both sides. Thinly slice the yellow onions.
In a large, oven-safe skillet (preferably cast iron), melt butter with 1 tbsp olive oil over medium-low heat. Add the sliced onions and a pinch of salt. Cook, stirring occasionally, for 25-35 minutes, or until the onions are deeply golden brown and caramelized. Do not rush this step; low and slow is key.
While the onions caramelize, heat the remaining 1 tbsp olive oil in a separate pan over medium-high heat. Sear the seasoned chicken breasts for 3-4 minutes per side, until golden brown. The chicken will not be cooked through at this point. Remove chicken from the pan and set aside.
Once onions are caramelized, add the minced garlic to the skillet and cook for 1 minute until fragrant. Pour in the beef broth (and sherry/balsamic if using) and scrape up any browned bits from the bottom of the pan. Add the fresh thyme sprig and bring the liquid to a gentle simmer.
Return the seared chicken breasts to the skillet, nestling them into the onion mixture. Reduce heat to low, cover the skillet, and simmer for 10-15 minutes, or until the chicken is cooked through (internal temperature reaches 165°F / 74°C).
Remove the thyme sprig. Place a slice of provolone or Gruyere cheese on top of each chicken breast. You can either cover the skillet again for 1-2 minutes to melt the cheese, or transfer the skillet to a preheated broiler for 1-2 minutes until the cheese is bubbly and lightly golden.
Carefully remove the skillet from the oven/broiler. Let rest for a few minutes before serving. Garnish with fresh parsley or chives, if desired.
What to keep in mind.
4 tips from the recipe — small details that make a real difference to the final dish.
- 1For truly sweet and deeply flavored caramelized onions, resist the urge to rush the process. Low and slow heat is essential, allowing the sugars to develop without burning.
- 2Ensure your chicken breasts are patted completely dry before searing. This promotes better browning and a more flavorful crust.
- 3Using a good quality beef broth will significantly enhance the 'French onion' flavor profile of the dish. For an extra layer of complexity, deglaze the pan with a splash of dry sherry or balsamic vinegar after the garlic.
- 4If your skillet isn't oven-safe, you can transfer the chicken and onion mixture to an oven-safe dish before adding cheese and broiling.
Adapt it for your goals.
Cheese Swap
Instead of provolone, try using shredded Gruyere, Fontina, or even smoked Gouda for a different cheesy dimension.
Mushroom BoostMushroom Boost
Add 1 cup of sliced cremini mushrooms to the skillet with the onions during the last 10-15 minutes of their caramelization for an extra layer of earthy umami.
Protein AlternativeProtein Alternative
This recipe works wonderfully with boneless, skinless chicken thighs or even pork tenderloin medallions. Adjust cooking times as needed for different proteins.
Why this is on our healthy list.
High in Lean Protein
Chicken breasts are an excellent source of lean protein, essential for muscle repair, growth, and satiety, helping you feel full longer.
Rich in Antioxidants
Onions are packed with antioxidants, particularly quercetin, which helps combat oxidative stress and inflammation in the body.
Low Carbohydrate
Naturally low in carbohydrates, this dish is suitable for those following low-carb or ketogenic diets, providing a flavorful meal without excess sugars.
Frequently asked questions
Yes, you can caramelize the onions up to 2-3 days in advance and store them in an airtight container in the refrigerator. Reheat gently before adding the chicken and broth.
