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Skillet French Onion Chicken and Rice Casserole

A comforting one-pan meal featuring caramelized onions, tender chicken, and melty cheese, perfect for cozy family dinners.
Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Course Comfort Food, Dinner, Main Course
Cuisine American, French
Servings 6 servings
Calories 450 kcal

Ingredients
  

Main Ingredients

  • 1.5 pounds boneless, skinless chicken thighs or breasts, trimmed Thighs stay juicier.
  • 2 large yellow onions, thinly sliced Caramelized until deep golden.
  • 3 cloves garlic, minced Wakes up the savory notes.
  • 1.5 cups long-grain white rice, rinsed Or brown rice for a nuttier, healthier option.
  • 3 cups low-sodium chicken broth Keeps the dish moist and flavorful.
  • 0.5 cup dry white wine (optional) Deglazes the pan and adds brightness.
  • 1 cup grated Gruyère or Swiss cheese Melts into a luscious top.
  • 2 tablespoons olive oil or butter For onion bliss.
  • 1 teaspoon fresh thyme leaves Or 1/2 teaspoon dried.
  • 1 tablespoon Dijon mustard Ties the French onion theme together.
  • 1 tablespoon cornstarch mixed with 2 tablespoons water (optional) To thicken if you like a saucier casserole.
  • to taste Salt and freshly ground black pepper

Instructions
 

Preparation

  • Caramelize the onions: In a large, oven-safe skillet over medium heat, warm olive oil or butter. Add sliced onions with a pinch of salt and cook, stirring occasionally, until deep golden and sweet—about 20 minutes.
  • Sear the chicken: Season chicken with salt and pepper. Push onions to the side, add a touch more oil, and sear chicken pieces 2–3 minutes per side until golden.
  • Deglaze and flavor: Add garlic and cook for 30 seconds. Pour in white wine (if using) to deglaze and scrape browned bits. Stir in Dijon and thyme. Mix in rice so it coats with flavor.
  • Add broth and simmer: Pour in chicken broth and bring to a gentle simmer. Tuck the chicken into the rice-onion bed. If you want a saucier finish, add the cornstarch mixture now.
  • Bake: Transfer skillet to a 350°F oven and bake, covered, for 20–25 minutes (longer for brown rice) until rice is tender and chicken is cooked through.
  • Finish with cheese: Remove foil or lid, sprinkle Gruyère evenly, and bake uncovered for 5–8 minutes until bubbly and golden.
  • Rest and serve: Let the casserole rest for 5 minutes so flavors settle, then spoon onto plates and savor.

Notes

For a leaner dish, choose chicken breast and reduce oil. Make it spicy by stirring in red pepper flakes or smoked paprika. For festive occasions, top with breadcrumbs mixed with melted butter and parsley before broiling.
Keyword Casserole, Comfort Food, Dinner Recipe, French Onion Chicken, One-Pan Meal