Introduction

This Onion Chicken Orzo Casserole is a comforting and flavorful dish that combines tender shredded chicken, caramelized onions, and creamy orzo pasta baked to golden perfection. It’s an easy one-pan meal that’s perfect for cozy dinners or feeding a crowd.

In a close-up view, a white bowl is filled with creamy, cooked rice mixed with small chunks of light golden chicken, forming the first layer with a soft texture. On top, there is a layer of crispy, caramelized brown fried onions scattered unevenly, adding a crunchy contrast. The entire dish is garnished with small pieces of fresh green parsley, sprinkled randomly on the surface. The background shows a white marbled texture, creating a clean and bright setting. photo taken with an iphone --ar 4:5 --v 7

Ingredients

2 tablespoons unsalted butter
1 tablespoon olive oil
2 large yellow onions, thinly sliced
1 teaspoon granulated sugar
1/2 teaspoon kosher salt
3 garlic cloves, minced
1 1/2 cups orzo pasta
2 cups cooked shredded chicken
1/2 teaspoon dried thyme
1/4 teaspoon freshly ground black pepper
2 cups low-sodium chicken broth
1 cup heavy cream
1 1/2 cups shredded mozzarella cheese
1/2 cup grated Parmesan cheese
1/2 teaspoon Worcestershire sauce or balsamic glaze (optional)

Instructions

Step 1: Melt the unsalted butter and olive oil in a large oven-safe skillet over medium heat. Add the thinly sliced onions, granulated sugar, and kosher salt. Cook, stirring occasionally, for 20 to 25 minutes until the onions are deeply golden and caramelized. Stir in the minced garlic during the last 2 minutes of cooking.
Step 2: Stir in the orzo pasta and cook for 2 minutes to lightly toast it. Add the shredded chicken, dried thyme, black pepper, and Worcestershire sauce or balsamic glaze if using. Mix everything thoroughly to combine.
Step 3: Pour in the chicken broth and heavy cream. Bring the mixture to a gentle simmer, then reduce the heat to low. Cover and cook for 8 to 10 minutes, stirring occasionally, until the orzo is tender.
Step 4: Stir in 1 cup of mozzarella cheese and all of the Parmesan cheese. Mix until the cheeses are melted and the sauce becomes creamy.
Step 5: Preheat your oven to 375°F (190°C). Sprinkle the remaining 1/2 cup mozzarella cheese evenly over the top of the casserole. Bake uncovered for 10 to 15 minutes until the casserole is bubbly and golden on top.
Step 6: Remove the casserole from the oven and allow it to rest for 5 to 10 minutes before serving. Garnish with fresh thyme or parsley if desired.

Tips & Variations

For a deeper flavor, use homemade chicken broth or stock instead of store-bought.
Swap mozzarella for gouda or fontina for a richer cheese flavor.
Add sautéed mushrooms or spinach for extra veggies and texture.
If you prefer a crispier top, broil the casserole for 1-2 minutes at the end of baking.

Storage

Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in the microwave or oven, adding a splash of broth or cream if needed to restore creaminess. This casserole does not freeze well, as the cream and cheese textures may change.

How to Serve

A close-up view of a creamy rice dish served in a white bowl, showing a thick layer of cooked rice mixed with tender pieces of light golden chicken. On top, there is a generous layer of crispy, caramelized onions with a rich brown color and slightly curled texture, sprinkled with small bright green parsley pieces adding fresh color contrast. The rice underneath is soft and glossy, with a light golden tint from the sauce coating every grain evenly. The bowl is set against a white marbled surface, highlighting the dish’s warm and inviting colors. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use a different type of pasta instead of orzo?

Yes, small pasta shapes like acini di pepe, ditalini, or even small elbows can be used, but cooking times may vary slightly.

Is it possible to make this casserole dairy-free?

You can substitute the butter with a plant-based spread, use dairy-free cream alternatives, and choose a vegan cheese to make this dish dairy-free. Keep in mind the flavor and texture will be slightly different.