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French Onion Chicken Orzo Casserole

A comforting and flavorful casserole that combines caramelized onions, tender chicken, and creamy orzo pasta.
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Prep Time 30 minutes
Cook Time 30 minutes
Total Time 1 hour
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: Comfort Food, French
Calories: 450
Ingredients Method Notes

Ingredients
  

For the Onion Mixture
  • 2 tablespoons unsalted butter
  • 1 tablespoon olive oil
  • 2 large yellow onions (thinly sliced)
  • 1 teaspoon sugar
  • 1/2 teaspoon salt
  • 3 cloves garlic (minced)
For the Casserole
  • 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
  • 1/2 teaspoon Worcestershire sauce or balsamic glaze (optional for added depth)

Method
 

Caramelize the Onions
  1. In a large oven-safe skillet or Dutch oven, melt the butter and olive oil over medium heat. Add the 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.
Add Orzo and Chicken
  1. Stir in the orzo and cook for 2 minutes, allowing it to lightly toast. Add the shredded chicken, thyme, pepper, and Worcestershire sauce if using. Mix well.
Pour in Liquids
  1. Add the chicken broth and cream. Bring to a gentle simmer. Reduce the heat to low, cover, and let it cook for 8-10 minutes, stirring occasionally, until the orzo is tender.
Add Cheese
  1. Stir in 1 cup of mozzarella and the Parmesan cheese. Mix until melted and creamy.
Bake the Casserole
  1. Preheat your oven to 375°F (190°C). Sprinkle the remaining 1/2 cup of mozzarella over the top. Bake uncovered for 10-15 minutes, until bubbly and golden on top.
Serve
  1. Let it rest for 5-10 minutes before serving. Garnish with fresh thyme or parsley if desired.

Notes

For a creamier texture, stir the cheese in until fully melted before baking. Common mistakes include rushing the caramelization process, which can diminish flavor.