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French Onion Chicken Orzo Casserole

A warm and comforting dish that combines classic French onion soup flavors with tender chicken and creamy orzo pasta, perfect for family dinners or chilly evenings.
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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: Comfort Food, French
Calories: 550
Ingredients Method Notes

Ingredients
  

For the onion base
  • 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)
Main ingredients
  • 1 1/2 cups orzo pasta
  • 2 cups cooked shredded chicken (rotisserie 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
  • Optional: 1/2 teaspoon Worcestershire sauce or balsamic glaze (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.
  2. Add the sliced onions, sugar, and salt. Cook for 20–25 minutes, stirring occasionally, until the onions turn deeply golden and caramelized.
  3. Add 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. Add the shredded chicken, thyme, pepper, and Worcestershire if using. Mix well.
Pour in Liquids
  1. Add the chicken broth and cream. Bring it to a gentle simmer.
  2. Reduce the 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 of 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 of mozzarella over the top.
  3. Bake uncovered for 10–15 minutes until bubbly and golden.
Serve
  1. Let it rest for 5–10 minutes before serving.
  2. Garnish with fresh thyme or parsley if desired.

Notes

Keep an eye on the onions while caramelizing; they can burn if left unattended. Feel free to adjust the seasonings to fit your taste. For a crispy top, broil the casserole for a couple of minutes after baking.