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French Onion Chicken Orzo Casserole

This French Onion Chicken Orzo Casserole is a one-pot wonder that combines tender chicken, perfectly caramelized onions, and creamy orzo for a restaurant-worthy meal without the fuss. Ready in about 45 minutes, it delivers maximum flavor with minimal effort, making it an ideal weeknight comfort food.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 4 servings
Course: Main Course
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

Ingredients
  • 2 tablespoons unsalted butter
  • 1 tablespoon olive oil
  • 2 large yellow onions thinly sliced
  • 1 teaspoon sugar
  • ½ teaspoon salt
  • 3 garlic cloves minced
  • 1½ cups orzo pasta
  • 2 cups cooked shredded chicken rotisserie chicken works well
  • ½ teaspoon dried thyme
  • ¼ teaspoon black pepper
  • 2 cups low-sodium chicken broth
  • 1 cup heavy cream
  • 1½ cups shredded mozzarella cheese
  • ½ cup grated Parmesan cheese
  • ½ teaspoon balsamic glaze optional, for added depth

Equipment

  • Large oven-safe skillet or Dutch oven
  • Oven

Method
 

  1. Preheat your oven to 350°F (175°C).
  2. In a large oven-safe skillet or Dutch oven, melt 2 tablespoons of unsalted butter with 1 tablespoon olive oil over medium heat.
  3. Add the thinly sliced yellow onions along with 1 teaspoon of sugar and ½ teaspoon of salt. Cook slowly for 20-25 minutes, stirring occasionally, until the onions turn a deep golden color and become sweet and caramelized.
  4. During the final 1-2 minutes of caramelizing, stir in 3 minced garlic cloves, taking care not to burn them.
  5. Add 1½ cups of orzo pasta to the pan and toast it for about 2 minutes to develop a subtle nutty flavor.
  6. Fold in 2 cups of shredded chicken, ½ teaspoon dried thyme, and ¼ teaspoon black pepper.
  7. Pour in 2 cups of low-sodium chicken broth and 1 cup of heavy cream. Bring the mixture to a gentle simmer, allowing the orzo to cook while the flavors meld together.
  8. Sprinkle 1½ cups of shredded mozzarella cheese and ½ cup of grated Parmesan cheese evenly over the top. Optionally, drizzle ½ teaspoon of balsamic glaze over the finished dish for an extra layer of flavor.
  9. Transfer the skillet to the preheated oven and bake until the cheese is melted and begins to turn golden around the edges.
  10. Remove from the oven and allow the casserole to rest for a few minutes before serving.

Notes

This casserole is highly versatile and welcomes a number of substitutions. If you don’t have heavy cream, half-and-half or whole milk work in a pinch, and rotisserie chicken can be swapped for turkey or even mushrooms for a vegetarian version. Patience during the caramelization of the onions is key to achieving their deep, sweet flavor. Serve with a simple green salad, roasted asparagus, or crusty garlic bread for a complete meal.