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French Onion Chicken Orzo Casserole dish topped with cheese and onions

French Onion Chicken Orzo Casserole

A comforting and flavorful casserole combining caramelized onions, tender chicken, and creamy orzo, perfect for family dinners and gatherings.
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Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: American
Calories: 650
Ingredients Method Notes

Ingredients
  

For the casserole
  • 2 tablespoons Butter Adds richness and helps in caramelizing onions.
  • 2 tablespoons Olive Oil Enhances flavor and prevents butter from burning.
  • 2 cups Onions, sliced The main flavor, offering sweetness and depth when caramelized.
  • 1 teaspoon Sugar Helps to caramelize onions and balance the flavors.
  • 1 teaspoon Salt Enhances the overall taste of the dish.
  • 2 cloves Garlic, minced Adds aroma and savory notes.
  • 1 cup Orzo pasta Absorbs flavors and provides texture.
  • 2 cups Shredded Chicken Offers protein and heartiness to the meal.
  • 1 teaspoon Thyme, dried Introduces herbal notes.
  • 1/2 teaspoon Pepper Adds a bit of spice.
  • 1 tablespoon Worcestershire Sauce Optional, for an extra depth of flavor.
  • 2 cups Chicken Broth Provides moisture and flavor.
  • 1 cup Heavy Cream Contributes creaminess and richness to the sauce.
  • 1 1/2 cups Mozzarella Cheese, shredded Melts beautifully, creating a gooey topping.
  • 1/2 cup Parmesan Cheese, grated Adds a sharp, salty flavor.

Method
 

Preparation
  1. In a large oven-safe skillet, melt the butter and olive oil over medium heat. Add sliced onions, sugar, and salt. Cook for 20–25 minutes, stirring occasionally, until the onions are deeply golden.
  2. Stir in the orzo and let it toast for 2 minutes. Then add the shredded chicken, thyme, pepper, and Worcestershire sauce if using. Mix everything well.
  3. Add the chicken broth and heavy cream. Bring the mixture to a gentle simmer. Reduce the heat to low, cover, and cook for 8–10 minutes, stirring occasionally until the orzo is tender.
  4. Stir in 1 cup of mozzarella and Parmesan cheese. Mix until the cheeses melt and create a creamy texture.
  5. Preheat the oven to 375°F (190°C). Sprinkle the remaining ½ cup of mozzarella over the top. Bake uncovered for 10–15 minutes until bubbly and golden.
  6. Let the casserole rest for 5–10 minutes before serving. Garnish with fresh thyme or parsley if desired.

Notes

Using these tips can enhance your casserole-making experience: Caramelize well, cook thoroughly, don’t skip the cheese, allow resting time, and taste as you go.