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French Chicken Casserole

A rich, creamy French-inspired chicken casserole with mushrooms, herbs, and melted Gruyère cheese.
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Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Servings: 4 people
Course: Comfort Food, Dinner
Cuisine: European, French
Calories: 420
Ingredients Equipment Method Notes

Ingredients
  

Chicken & Protein
  • 6 boneless, skinless chicken thighs
  • 2 tbsp olive oil
  • salt and pepper to taste
Vegetables & Aromatics
  • 1 cup mushrooms sliced
  • 1 medium onion finely chopped
  • 3 garlic cloves minced
  • 0.5 cup carrots thinly sliced
Sauce & Creaminess
  • 1 cup heavy cream
  • 0.5 cup chicken stock
  • 0.25 cup dry white wine optional
  • 1 tsp Dijon mustard
  • 1 tsp fresh thyme leaves
  • 1 tsp fresh parsley chopped
Topping
  • 1 cup Gruyère or Swiss cheese shredded
  • 0.25 cup breadcrumbs optional

Equipment

  • Skillet
  • Casserole dish
  • Mixing bowls
  • Measuring cups and spoons

Method
 

  1. Preheat oven to 375°F (190°C). Lightly grease a medium-sized casserole dish.
  2. Season chicken thighs with salt and pepper. Heat olive oil in a skillet over medium-high heat and sear chicken for 2–3 minutes per side until golden. Remove and set aside.
  3. Sauté onions, garlic, mushrooms, and carrots in the same skillet until softened, about 5 minutes.
  4. Pour in white wine (if using) and scrape up any browned bits. Reduce slightly, about 2 minutes.
  5. Stir in heavy cream, chicken stock, Dijon mustard, and thyme. Simmer gently for 3–4 minutes. Adjust seasoning with salt and pepper.
  6. Place seared chicken thighs in casserole dish. Pour creamy vegetable mixture over chicken.
  7. Sprinkle shredded cheese evenly over casserole. Add breadcrumbs if desired.
  8. Cover with foil and bake 20 minutes. Remove foil and bake 10–15 minutes until cheese is melted and golden.
  9. Let rest 5 minutes, garnish with parsley, and serve warm.

Notes

For a tangy twist, add lemon zest to the cream sauce. Perfect for make-ahead dinners.