French Onion Chicken Orzo Casserole

Update : December 26, 2025

Why Make This Recipe

French Onion Chicken Orzo Casserole is a fantastic dish filled with rich flavors that everyone will love. It combines the savory taste of caramelized onions with tender chicken and creamy orzo pasta. This recipe is perfect for a cozy dinner or a family gathering, and it comes together easily in one pan. Plus, it’s a comforting meal that feels indulgent without being too complicated to make.

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 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)

Directions

Caramelize the Onions: 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 are deeply golden and caramelized. Add 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. Then, add the shredded chicken, thyme, pepper, and Worcestershire sauce 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 of mozzarella and the Parmesan cheese. Mix until melted and creamy.
Bake the Casserole: Preheat the oven to 375°F (190°C). Sprinkle the remaining 1/2 cup of 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

This casserole can be served as a main dish. It pairs well with a simple green salad or steamed vegetables. For an extra touch, offer some crusty bread on the side to soak up the creamy sauce.

How to Store French Onion Chicken Orzo Casserole

If you have leftovers, store the casserole in an airtight container in the refrigerator. It will keep well for up to 3-4 days. To reheat, place it in the oven at 350°F (175°C) until warmed through, or use a microwave.

Tips to Make French Onion Chicken Orzo Casserole

For extra flavor, you can use homemade chicken broth instead of store-bought.
Make sure to stir the orzo occasionally while it’s cooking to prevent it from sticking.
Feel free to add any vegetables you like, such as spinach or mushrooms, for added nutrition.

Variation

You can easily make this casserole vegetarian by replacing the chicken with cooked lentils or chickpeas. Also, you can use different cheeses like cheddar or gouda for a unique twist.

FAQs

1. Can I use regular pasta instead of orzo?
Yes, you can substitute orzo with another small pasta shape, but cooking times may vary.

2. Can I freeze the casserole?
Yes, you can freeze the casserole before baking. Just cover it well and store it in the freezer for up to 3 months. Thaw it in the fridge overnight before baking.

3. Is there a dairy-free option?
You can use a plant-based cream and dairy-free cheese alternatives to make this recipe dairy-free.