Name: French Onion Chicken Orzo Casserole Recipe
Prep time: 10 min
Cook time: PT-490170H3M39S
Total time: PT-490170H3M39S
Cuisine: French-American Fusion
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 (divided); 1/2 cup grated Parmesan cheese; 1/2 teaspoon Worcestershire sauce or balsamic glaze (for added depth)

Print Recipe· 4.1 from 10 reviews

If you’re craving something cozy, rich, and bursting with comforting flavors, this French Onion Chicken Orzo Casserole Recipe is exactly what you need. Imagine tender caramelized onions mingling with juicy shredded chicken and perfectly cooked orzo pasta, all enveloped in a creamy, cheesy sauce that melts into every bite. It’s an irresistible one-dish meal that feels like a warm hug on a plate, perfect for busy weeknights or a special weekend dinner. Whether you’re a fan of French onion soup or simply love hearty casseroles, this recipe brings those beloved flavors to a wholesome new level.

Ingredients You’ll Need

The image shows raw ingredients arranged neatly on a white marbled surface. There are four raw pale pink chicken pieces on a white round plate placed on the right side. Below the chicken, there is a white bowl full of chopped white onions. To the left of the onions, a white bowl contains uncooked golden-yellow orzo pasta. Above the orzo is a clear glass measuring cup filled with light brown broth. Next to the measuring cup is a small white bowl with dried herbs. Below the herbs, a small white bowl contains slices of light yellow cheese. Near the cheese are three peeled garlic cloves. To the right of the garlic is a small gray bowl holding two dollops of cream cheese or butter. A crumpled light gray cloth is placed on the left side. The composition is clean and simple, focusing on the raw natural colors of the ingredients. photo taken with an iphone --ar 4:5 --v 7

Gathering your ingredients is a breeze with this recipe, as each one plays a crucial role in building layers of amazing flavor, creamy texture, and delightful color. From the sweetness of caramelized onions to the melty cheese that finishes it all off, every element contributes to the magic.

Unsalted butter (2 tablespoons): Helps caramelize the onions beautifully without adding extra salt.
Olive oil (1 tablespoon): Adds a subtle fruitiness and prevents butter from burning.
Yellow onions (2 large, thinly sliced): The star for that deep, sweet, and savory caramelized flavor.
Sugar (1 teaspoon): Enhances the onions’ natural sweetness for perfect caramelization.
Salt (1/2 teaspoon): Balances and brings out the sweetness in the onions.
Garlic cloves (3, minced): Adds a gentle punch of aroma and depth.
Orzo pasta (1 1/2 cups): Small, rice-shaped pasta that absorbs flavor and cooks quickly.
Cooked shredded chicken (2 cups): Tender protein that makes the casserole hearty and satisfying.
Dried thyme (1/2 teaspoon): Adds a touch of earthiness that pairs perfectly with the onions.
Black pepper (1/4 teaspoon): For just the right hint of spice and warmth.
Low-sodium chicken broth (2 cups): Creates the flavorful cooking liquid ensuring moist orzo.
Heavy cream (1 cup): Makes the sauce luscious and creamy; half and half can be used as a lighter option.
Shredded mozzarella cheese (1 1/2 cups): Provides gooey, melty goodness throughout and a golden crust.
Grated Parmesan cheese (1/2 cup): Enhances the taste with its sharp, nutty notes.
Optional Worcestershire sauce or balsamic glaze (1/2 teaspoon): Adds extra depth and a tangy finish if desired.

How to Make French Onion Chicken Orzo Casserole Recipe

Step 1: Caramelize the Onions

Begin by melting the butter and olive oil in a large oven-safe skillet or Dutch oven over medium heat. Add the thinly sliced onions along with the sugar and salt. Cook slowly for about 20 to 25 minutes, stirring occasionally, until the onions turn a deep golden brown and smell wonderfully sweet. In the last couple of minutes, stir in the minced garlic to release its fragrance without burning it. This slow caramelization is key to infusing the dish with that iconic French onion flavor.

Step 2: Add the Orzo and Chicken

Next, stir in the orzo pasta, letting it toast lightly for two minutes in the flavorful onion mixture—this adds a subtle nutty note. Add the shredded cooked chicken, dried thyme, black pepper, and if you’re using it, that splash of Worcestershire sauce for an extra flavor kick. Mix everything well so each bite will be bursting with savory goodness.

Step 3: Pour in the Liquids and Cook

Pour in the chicken broth and heavy cream, bringing the mixture to a gentle simmer. Reduce heat to low, cover the skillet, and let it cook for 8 to 10 minutes. Stir occasionally to prevent sticking and ensure the orzo cooks perfectly tender as it soaks up all those luscious flavors.

Step 4: Incorporate the Cheese

Once the orzo is tender and creamy, stir in one cup of shredded mozzarella and the Parmesan cheese. Mix until the cheeses melt into a rich, velvety sauce enveloping every bite. This step is where the casserole really comes together with that irresistible cheesiness.

Step 5: Bake the Casserole

Preheat your oven to 375°F (190°C). Sprinkle the remaining 1/2 cup of mozzarella cheese over the top of your casserole. Bake uncovered for 10 to 15 minutes until the cheese is bubbly and golden brown, creating a gorgeous crust that adds a satisfying texture.

Step 6: Rest and Serve

After baking, allow the casserole to rest for about 5 to 10 minutes. This resting time lets the flavors deepen and the dish set slightly, making it easier to serve. If you want, garnish with fresh thyme or parsley for a pop of brightness and color.

How to Serve French Onion Chicken Orzo Casserole Recipe

A white bowl holds a layered pasta dish with visible short noodles mixed with creamy melted cheese underneath a topping of crispy fried onion rings that are golden-brown and slightly curled. Bright green parsley pieces are scattered on top adding spots of color. The pasta looks soft and rich, with the cheese stretching between the noodles. The background shows a white marbled texture. photo taken with an iphone --ar 4:5 --v 7

Garnishes

Simple garnishes like fresh thyme sprigs, chopped parsley, or even a light dusting of extra Parmesan can elevate your casserole’s presentation. These additions add freshness and a hint of herbaceous brightness that cuts through the richness beautifully.

Side Dishes

This casserole shines on its own but pairs wonderfully with a crisp green salad or steamed vegetables like asparagus or green beans. The freshness and crunch from the sides will contrast nicely with the creamy, cheesy casserole, balancing your meal perfectly.

Creative Ways to Present

For a fun twist, serve portions in individual ramekins for personal comfort food servings. Alternatively, top with crispy fried onions or a sprinkle of paprika for a bit of color and texture variation. This French Onion Chicken Orzo Casserole Recipe is versatile enough to be dressed up or kept delightfully simple.

Make Ahead and Storage

Storing Leftovers

If you have leftovers (which might be tough to resist), store them in an airtight container in the refrigerator for up to 3 days. The flavors meld even more after resting, making the next meal just as delicious.

Freezing

You can freeze this casserole before baking for up to 2 months. Cover tightly with foil or plastic wrap, then thaw overnight in the fridge before baking as directed. This makes meal prepping or busy weeknight dinners incredibly easy.

Reheating

To reheat, warm the casserole in an oven-safe dish at 350°F (175°C) until heated through and bubbly, about 15-20 minutes. Avoid microwaving if you want to maintain that lovely baked crust and creamy texture.

FAQs

Can I use a different type of cheese?

Absolutely! While mozzarella and Parmesan create a beautifully melty and flavorful combo, feel free to experiment with Gruyère, fontina, or cheddar for variations.

Is there a vegetarian version of the French Onion Chicken Orzo Casserole Recipe?

You can omit the chicken and add in hearty mushrooms or a medley of your favorite vegetables. Using vegetable broth will keep the dish fully vegetarian and just as delicious.

Can I prepare this casserole in advance?

Yes, it’s perfect for making ahead! Assemble everything up to the baking step, cover, and store in the fridge overnight. Bake just before serving for a quick, impressive meal.

What if I don’t have orzo pasta?

You can substitute orzo with other small pasta shapes like acini di pepe, Israeli couscous, or even small elbow macaroni. Just adjust cooking time as needed.

How can I make this dish lighter?

Swap heavy cream for half and half or whole milk to reduce fat content without sacrificing too much creaminess. Using less cheese on top also helps keep it lighter.

Final Thoughts

This French Onion Chicken Orzo Casserole Recipe has quickly become one of my absolute favorites because it combines all the best parts of comfort food into one incredibly satisfying dish. The cozy flavors take minimal effort but deliver a big wow, making it perfect for feeding a crowd or treating yourself on any day. Give it a try and watch it become a staple in your kitchen just like it has in mine.