Go Back

French Onion Chicken Orzo Casserole

A creamy and savory one-pan casserole featuring caramelized onions, shredded chicken, orzo pasta, and melted mozzarella cheese.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 6 servings
Course: Casserole, Dinner, Main Course
Cuisine: American, Comfort Food
Calories: 600
Ingredients Method Notes

Ingredients
  

For the casserole
  • 2 tablespoons unsalted butter
  • 1 tablespoon olive oil
  • 2 large yellow onions, thinly sliced
  • 1 teaspoon sugar
  • 1/2 teaspoon salt
  • 3 cloves garlic, minced
  • 1 1/2 cups orzo pasta
  • 2 cups cooked shredded chicken Rotisserie chicken works well.
  • 1/2 teaspoon dried thyme
  • 1/4 teaspoon black pepper
  • 2 cups low-sodium chicken broth
  • 1 cup heavy cream Or half and half for a lighter option.
  • 1 1/2 cups shredded mozzarella cheese
  • 1/2 cup grated Parmesan cheese
  • 1/2 teaspoon Worcestershire sauce or balsamic glaze (optional) For added depth.

Method
 

Caramelize the Onions
  1. In a large oven-safe skillet or Dutch oven, melt the butter and olive oil over medium heat. Add the sliced onions, sugar, and salt. Cook for 20–25 minutes, stirring occasionally, until the onions turn deeply golden and caramelized.
  2. Stir in the minced garlic during the last 1–2 minutes.
Add Orzo and Chicken
  1. Stir in the orzo and cook for 2 minutes to lightly toast it.
  2. Toss in the shredded chicken, thyme, pepper, and Worcestershire sauce if using. Mix well.
Pour in Liquids
  1. Add the chicken broth and cream, bringing the mixture to a gentle simmer.
  2. Reduce heat to low, cover, and let it cook for 8–10 minutes, stirring occasionally, until the orzo is tender.
Add Cheese
  1. Stir in 1 cup mozzarella and the Parmesan cheese. Mix until everything is melted and creamy.
Bake the Casserole
  1. Preheat your oven to 375°F (190°C).
  2. Sprinkle the remaining 1/2 cup mozzarella over the top. Bake uncovered for 10–15 minutes until bubbly and golden on top.
Serve
  1. Let it rest for 5–10 minutes before diving in. Garnish with fresh thyme or parsley if desired.

Notes

Timing is everything; caramelize the onions properly for the best flavor. Use rotisserie chicken for quick preparation. Feel free to swap in different types of cheese. If you want to lighten it up, opt for half and half instead of heavy cream. Add fresh herbs before serving for extra flavor.