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French Onion Chicken Orzo Casserole

A delightful and creamy casserole that combines the comforting flavors of French onion soup with orzo and shredded chicken, perfect for a cozy night in.
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Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Servings: 6 servings
Course: Casserole, Dinner, Main Course
Cuisine: American, French
Calories: 600
Ingredients Method Notes

Ingredients
  

For the onion base
  • 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 lighter option)
  • 1 1/2 cups shredded mozzarella cheese
  • 1/2 cup grated Parmesan cheese
  • 1/2 teaspoon Worcestershire sauce (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.
  2. Add sliced onions, sugar, and salt. Cook for 20–25 minutes, stirring occasionally, until the onions are deeply golden and caramelized.
  3. 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, letting it lightly toast.
  2. Add shredded chicken, thyme, pepper, and Worcestershire if using. Mix well.
Pour in Liquids
  1. Add chicken broth and cream. Bring to a gentle simmer.
  2. Reduce 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 mozzarella and Parmesan cheese. Mix until melted and creamy.
Bake the Casserole
  1. Preheat oven to 375°F (190°C). Sprinkle the remaining 1/2 cup mozzarella over the top.
  2. 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

Timing is key: Caramelize your onions slowly for maximum flavor. You can swap chicken with leftover turkey or use veggie broth for a lighter option. Add breadcrumbs mixed with cheese on top before baking for a crunch.