French Onion Chicken Orzo Casserole

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Update : November 13, 2025

Delicious French Onion Chicken Orzo Casserole topped with melted cheese.

Why Make This Recipe

French Onion Chicken Orzo Casserole is a delightful dish that combines the rich flavors of caramelized onions with tender orzo pasta and juicy chicken. It’s a comforting meal that is easy to prepare and perfect for a cozy dinner. This casserole is not only delicious but also filling, making it a great choice for family gatherings or weekday meals. With a blend of cheeses on top, it offers both creaminess and a satisfying crunch.

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:

  1. 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.

  2. 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.

  3. 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.

  4. Add Cheese: Stir in 1 cup mozzarella and the Parmesan cheese. Mix until melted and creamy.

  5. 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.

  6. Serve: Let it rest for 5–10 minutes before serving. Garnish with fresh thyme or parsley if desired.

French Onion Chicken Orzo Casserole

How to Serve French Onion Chicken Orzo Casserole

Serve the casserole warm straight from the oven. You can pair it with a simple green salad or crusty bread for a complete meal. Garnishing with fresh herbs like thyme or parsley adds an extra touch of flavor and color.

How to Store French Onion Chicken Orzo Casserole

Store any leftovers in an airtight container in the refrigerator. It will keep well for about 3–4 days. To reheat, warm it in the oven or microwave until heated through. You may need to add a splash of chicken broth or cream to revive the creamy texture.

Tips to Make French Onion Chicken Orzo Casserole

  • For deeper flavor, let the onions caramelize longer, but be careful not to burn them.
  • Use leftover chicken or rotisserie chicken for a quicker preparation.
  • Add some sautéed mushrooms or spinach for extra veggies.
  • If you like a bit of spice, consider adding red pepper flakes to the mix.

Variation

You can switch up the cheese if preferred. Try using Gouda or cheddar for a different flavor. You can also replace orzo with a different pasta like small shells or even rice.

FAQs

Can I make this casserole ahead of time?
Yes, you can prepare the casserole a day in advance and store it in the fridge. Just bake it when you’re ready to serve.

Is it okay to freeze the casserole?
Yes, you can freeze the casserole before baking. Just cover it tightly with plastic wrap and foil. To cook, thaw it in the fridge overnight, then bake as directed.

What if I don’t have heavy cream?
You can use half and half, whole milk, or even a non-dairy milk alternative in a pinch. It may make the casserole a bit lighter.

Print
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French Onion Chicken Orzo Casserole

A comforting casserole that combines caramelized onions, tender orzo pasta, and juicy chicken, topped with a blend of cheeses.

  • Total Time: 50 minutes
  • Yield: 4 servings 1x

Ingredients

Scale
  • 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
  • 1/2 teaspoon dried thyme
  • 1/4 teaspoon 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
  • Optional: 1/2 teaspoon Worcestershire sauce or balsamic glaze

Instructions

  1. 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.
  2. 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.
  3. 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.
  4. Stir in 1 cup mozzarella and the Parmesan cheese. Mix until melted and creamy.
  5. 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.
  6. Let it rest for 5–10 minutes before serving. Garnish with fresh thyme or parsley if desired.

Notes

For deeper flavor, let the onions caramelize longer. You can add sautéed mushrooms or spinach for extra veggies.

  • Author: jessica-baker
  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Category: Main Course
  • Method: Baking
  • Cuisine: French
  • Diet: None

Nutrition

  • Serving Size: 1 serving
  • Calories: 400
  • Sugar: 5g
  • Sodium: 600mg
  • Fat: 22g
  • Saturated Fat: 12g
  • Unsaturated Fat: 8g
  • Trans Fat: 0g
  • Carbohydrates: 40g
  • Fiber: 2g
  • Protein: 22g
  • Cholesterol: 100mg

Keywords: casserole, chicken, orzo, comfort food, French onion

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