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French Onion Chicken Breast : Caramelized Onions, Gruyère, and Rich Pan Sauce

French Onion Chicken Breast takes the cozy depth of French onion soup and transforms it into a skillet dinner worth savoring. Juicy chicken breasts are smothered in deeply caramelized onions, melted Gruyère cheese, and a savory, beefy reduction. It’s hearty, elegant, and surprisingly easy—all the comfort of a classic in just one pan.

Ingredients

Scale

4 boneless, skinless chicken breasts

Salt and pepper, to taste

2 tablespoons olive oil

2 tablespoons butter

2 large yellow onions, thinly sliced

1 teaspoon fresh thyme (or 1/2 tsp dried)

1/2 cup beef broth

1 tablespoon balsamic vinegar (optional, for added depth)

1 cup shredded Gruyère cheese (or Swiss)

Instructions

Season chicken with salt and pepper.

Heat olive oil in a skillet over medium-high heat. Sear chicken for 5–6 minutes per side until golden and nearly cooked through. Remove and set aside.

Reduce heat to medium. Add butter and sliced onions. Cook 15–20 minutes, stirring often, until deep golden and caramelized.

Add thyme, broth, and balsamic vinegar. Simmer 2–3 minutes to create a rich sauce.

Return chicken to skillet. Spoon onions over the top, sprinkle with Gruyère, and cover until cheese is melted and chicken is cooked through.

Serve warm with extra pan sauce.

Nutrition