French Onion Chicken Orzo Casserole

Name: French Onion Chicken Orzo Casserole
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: French
Ingredients: 2 tablespoons unsalted butter; 1 tablespoon olive oil; 2 large yellow onions, thinly sliced; 1 teaspoon sugar; 1/2 teaspoon salt; 3 garlic cloves, minced; 1 1/2 cups orzo pasta; 2 cups cooked shredded chicken (rotisserie recommended); 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

Jessica Baker

Update : December 22, 2025

French Onion Chicken Orzo Casserole in a dish, garnished with herbs

why make this recipe

French Onion Chicken Orzo Casserole combines the rich flavors of caramelized onions with tender chicken and creamy pasta. This dish is not only filling but also comforting, making it perfect for family dinners or gatherings. It’s simple to prepare and utilizes ingredients you may already have in your pantry. Plus, the cheesy, baked top adds a delightful texture that everyone will love.

how to make French Onion Chicken Orzo Casserole

Ingredients

2 tablespoons unsalted butter
1 tablespoon olive oil
2 large yellow onions (thinly sliced)
1 teaspoon sugar
1/2 teaspoon salt
3 garlic cloves (minced)
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 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)

Directions

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

how to serve French Onion Chicken Orzo Casserole

Serve this casserole warm, straight from the oven. It pairs well with a simple green salad or some crusty bread to soak up the delicious sauce. A sprinkle of fresh herbs on top can add a nice touch to the presentation.

how to store French Onion Chicken Orzo Casserole

Once cooled, store any leftovers in an airtight container in the refrigerator for up to 3 days. You can reheat it in the oven or microwave until warmed through. If you plan to store it for longer, consider freezing it before baking. Wrap the dish tightly with plastic wrap and then with foil. It can be stored in the freezer for up to 2 months.

tips to make French Onion Chicken Orzo Casserole

For extra flavor, try using homemade chicken broth if you have it.
Make sure to caramelize the onions well to bring out their sweetness.
If you like a bit of spice, add some red pepper flakes when mixing in the chicken and herbs.
For a lighter option, substitute half and half for the heavy cream.

variation

You can customize this casserole by adding vegetables like spinach, mushrooms, or bell peppers for more nutrition. Swap the chicken for turkey or even a meat alternative for a vegetarian option.

FAQs

1. Can I use different types of cheese?
Yes, you can experiment with different cheeses like cheddar or gouda for a unique flavor.

2. Can I make this dish ahead of time?
Absolutely! You can prepare it a day ahead, cover it, and refrigerate. Just bake it before serving.

3. What can I do if I don’t have orzo?
If you don’t have orzo, you can use other small pasta shapes like acini di pepe or ditalini. Just adjust the cooking time as needed.