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Creamy French onion chicken orzo casserole with golden baked chicken, melted cheese, and herbs in a white dish.

Homestyle Creamy French Onion Chicken Orzo Casserole

A rich and comforting baked casserole combining caramelized onions, tender chicken, creamy sauce, and orzo pasta. Inspired by French onion soup, it delivers deep savory flavor with a cheesy, homestyle appeal.
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Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Servings: 5 people
Cuisine: French-inspired / American comfort food
Calories: 480
Ingredients Method Notes

Ingredients
  

  • 2 pieces boneless chicken breasts or thighs
  • 3 pieces large onions, thinly sliced
  • 1 cup orzo pasta
  • 2 cups chicken broth
  • 1 cup cream or milk
  • 1 cup Gruyère or mozzarella cheese, shredded
  • 2 cloves cloves garlic, minced
  • 1 teaspoon dried thyme
  • 2 teaspoon butter
  • 1 teaspoon olive oil
  • Salt and pepper to taste

Method
 

  1. Slowly cook sliced onions in butter and olive oil over medium-low heat until deeply caramelized and golden.
  2. Season chicken with salt, pepper, and thyme, then sear in a hot pan until golden on the outside.
  3. Toast orzo in the same pan, then add chicken broth and simmer until partially cooked.
  4. Stir in cream or milk, garlic, and some cheese to form a creamy sauce.
  5. Combine onions, chicken, and orzo mixture in a baking dish.
  6. Top with remaining cheese and bake at 180°C (350°F) for 25–30 minutes until bubbly and golden.
  7. Let rest for 5–10 minutes before serving.

Notes

  • Do not rush caramelizing onions; this step builds the main flavor.
  • Use Gruyère for authentic taste or mozzarella as a substitute.
  • Can be made lighter using milk instead of cream and adding vegetables like spinach or mushrooms.
  • Add a splash of broth or milk when reheating to maintain creaminess.
  • Serve with salad or crusty bread.