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Easy French Onion Chicken Orzo Casserole – Creamy One-Dish Comfort Meal

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A creamy, comforting one-dish meal with caramelized onions, tender chicken, and orzo pasta in a savory cheesy sauce.

  • Total Time: 35 minutes
  • Yield: 6 servings 1x

Ingredients

Scale
  • 2 tablespoons unsalted butter
  • 1 tablespoon olive oil
  • 2 large yellow onions, thinly sliced
  • 1 teaspoon sugar
  • ½ teaspoon salt
  • 3 garlic cloves, minced
  • 1 ½ cups orzo pasta
  • 2 cups cooked shredded chicken (rotisserie works well)
  • ½ teaspoon dried thyme
  • ¼ teaspoon black pepper
  • 2 cups low-sodium chicken broth
  • 1 cup heavy cream (or half and half for lighter option)
  • 1 ½ cups shredded mozzarella cheese
  • ½ cup grated Parmesan cheese
  • Optional: ½ teaspoon Worcestershire sauce or balsamic glaze for added depth

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 ½ 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

  • Use rotisserie or cooked chicken for convenience.
  • Caramelize the onions slowly for best flavor.
  • Optional Worcestershire or balsamic adds depth to the sauce.
  • Let casserole rest before serving for creamier texture.
  • Author: lina
  • Prep Time: 15 minutes
  • Cook Time: 20 minutes
  • Category: Dinner
  • Method: Casserole
  • Cuisine: American

Nutrition

  • Serving Size: 1 plate
  • Calories: 480
  • Sugar: 5 g
  • Sodium: 720 mg
  • Fat: 24 g
  • Saturated Fat: 12 g
  • Unsaturated Fat: 10 g
  • Trans Fat: 0 g
  • Carbohydrates: 36 g
  • Fiber: 3 g
  • Protein: 32 g
  • Cholesterol: 110 mg