French Onion Chicken Orzo Casserole

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French Onion Chicken Orzo Casserole is the kind of cozy dish that makes you want to curl up with a blanket and savor every bite. It’s got the soul of a French onion soup and the comfort of a cheesy chicken pasta all in one bubbling casserole dish. Sweet caramelized onions, tender shredded chicken, creamy orzo, and a blanket of melted cheese make this dish irresistible on cold evenings or when you need a touch of warmth.

This casserole brings bold flavor without fussy steps. It’s a perfect recipe to use up leftover chicken, and the orzo cooks directly in the creamy broth. The cheesy, golden crust on top seals the deal. One scoop, and you’ll be hooked.

Why You’ll Love This French Onion Chicken Orzo Casserole

This recipe checks all the boxes for a weeknight favorite. It’s creamy, cheesy, savory, and filling, yet simple to prep. You’ll only need one baking dish and minimal cleanup. It also scales well for feeding a crowd or meal prepping. The deep, savory notes of caramelized onion pair beautifully with the mild chicken and creamy orzo.

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What Kind of Onions Should I Use?

Yellow onions are your best bet for caramelizing. They develop a deep golden color and rich sweetness as they cook low and slow. You can use white onions in a pinch, but avoid red onions, which can become bitter when cooked too long.

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Ingredients for the French Onion Chicken Orzo Casserole

Each ingredient plays a special role in building the comforting flavor and creamy texture of this dish:

• 4 tablespoons unsalted butter – for sauteing the onions and adding richness
• 2 large yellow onions, thinly sliced – caramelized to create a deep, sweet flavor
• 2 cloves garlic, minced – adds a savory base
• 1 tablespoon fresh thyme (or 1 teaspoon dried) – herbal notes that echo classic French onion soup
• 2 cups cooked shredded chicken – rotisserie or leftover chicken works perfectly
• 1 1/2 cups uncooked orzo pasta – small and creamy, perfect for casseroles
• 3 cups chicken broth – for cooking the orzo and creating a creamy sauce
• 1/2 cup heavy cream – adds luscious creaminess
• 1 teaspoon salt – balances all the flavors
• 1/2 teaspoon black pepper – a hint of spice
• 1 1/2 cups shredded Gruyere cheese – melty, nutty flavor perfect for a golden top
• 1/2 cup crispy fried onions – added on top for crunch
• Fresh chopped parsley – optional, for garnish and color

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How To Make the French Onion Chicken Orzo Casserole

Step 1: Caramelize the Onions

In a large skillet over medium heat, melt 4 tablespoons of butter. Add the thinly sliced onions and cook, stirring frequently, for about 25-30 minutes until they turn deep golden brown. Don’t rush this step — it’s key to the flavor.

Step 2: Build the Base

Add minced garlic and thyme to the onions and cook for another 2 minutes. Stir in the cooked shredded chicken and uncooked orzo. Mix everything well.

Step 3: Add Liquids and Season

Pour in 3 cups of chicken broth and 1/2 cup of heavy cream. Season with 1 teaspoon of salt and 1/2 teaspoon of black pepper. Stir everything together.

Step 4: Assemble and Bake

Preheat your oven to 375°F (190°C). Transfer the mixture into a greased 9×13 baking dish. Top with 1 cup of shredded Gruyere cheese. Cover with foil and bake for 25 minutes.

Step 5: Finish with Cheese and Crisp Topping

Remove the foil, sprinkle the remaining 1/2 cup of Gruyere and the crispy fried onions on top. Return to the oven and bake uncovered for another 10 minutes, or until the top is golden and bubbly.

Step 6: Serve

Let it rest for 5 minutes before serving. Sprinkle with chopped parsley if desired.

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How to Serve and Store French Onion Chicken Orzo Casserole

This casserole feeds about 6 people generously. It makes a filling main dish, and leftovers taste even better the next day as the flavors meld.

Store any cooled leftovers in an airtight container in the fridge for up to 4 days. To reheat, simply microwave portions or warm them in the oven covered with foil.

To freeze: cool the casserole completely, then cover tightly with foil and freeze for up to 2 months. Thaw overnight in the fridge before reheating.

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What to Serve With French Onion Chicken Orzo Casserole

Garlic Bread

The buttery, crisp texture of garlic bread is a classic side that pairs well with creamy casseroles.

Roasted Green Beans

A simple veggie side to add freshness and color to your plate.

Balsamic Roasted Brussels Sprouts

Their slightly bitter bite balances the sweetness of the onions beautifully.

Caesar Salad

A crisp romaine Caesar with crunchy croutons and tangy dressing cuts through the richness of the dish.

Tomato Cucumber Salad

Adds a refreshing, juicy crunch to the meal.

Sparkling Apple Cider or White Wine

The acidity helps balance the creamy base of the casserole.

Buttery Mashed Potatoes

If you’re craving more comfort, this combo is pure indulgence.

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Frequently Asked Questions

Can I use a different cheese?

Yes! While Gruyere is ideal for its nutty richness, Swiss, mozzarella, or even provolone can work in a pinch.

What if I don’t have cooked chicken?

You can quickly poach or roast a few chicken breasts, or use rotisserie chicken for convenience.

Can I make this ahead of time?

Absolutely. Assemble the casserole up to the baking step, cover it, and refrigerate for up to 24 hours. When ready, bake as instructed.

Can I use rice instead of orzo?

Yes, but you’ll need to adjust liquid amounts and baking time. Orzo cooks faster and absorbs less liquid than rice.

How do I make this gluten-free?

Use gluten-free orzo or a similar pasta substitute, and check your crispy onions to ensure they are gluten-free.

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📌 Save this recipe to your Pinterest dinner board so you can come back to it any time.
And let me know in the comments how yours turned out! Did you use Gruyere or go with mozzarella? Maybe added mushrooms? I love hearing your twists.
Questions are welcome too. Let’s help each other make dinner time easier and tastier.

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Conclusion

This French Onion Chicken Orzo Casserole is everything you love about a comforting dinner. It’s hearty, flavorful, and feels like a warm hug on a busy day. Whether you’re serving guests or feeding the family, this dish delivers. Want more cozy comfort recipes like this? Check out other hearty ideas like Creamy Italian Chicken Pasta, Garlic Chicken Stir Fry, and French Onion Ground Beef and Rice Casserole.

For more delicious recipes daily, follow me on Pinterest at Meals We Share.

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