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french onion chicken orzo casserole

French Onion Chicken Orzo Casserole (One-Pan Comfort Food)

A cozy, one-pan French onion chicken orzo casserole with caramelized onions, creamy orzo, tender chicken, and melty Gruyère cheese. This skillet-to-oven dish delivers all the rich flavors of French onion soup in a creamy, comforting weeknight meal that feels gourmet but comes together effortlessly.
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Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Course Dinner, Main Dish
Cuisine American Comfort Food, French-Inspired
Calories 485 kcal

Equipment

  • Oven-safe skillet or Dutch oven
  • Wooden spoon
  • Measuring Cups and Spoons
  • Cheese grater
  • Knife and cutting board
  • Oven mitts

Ingredients
  

  • 2 tbsp unsalted butter
  • 1 tbsp olive oil
  • 2 large yellow onions, thinly sliced
  • 1 tsp sugar
  • 0.5 tsp salt, plus more to taste
  • 3 cloves garlic, minced
  • 1.5 cups orzo pasta
  • 2 cups cooked shredded chicken
  • 0.5 tsp dried thyme (or 1 tsp fresh)
  • 0.25 tsp black pepper
  • 2 cups low-sodium chicken broth (or beef broth for richer flavor)
  • 1 cup heavy cream (or half-and-half)
  • 1.5 cups shredded Gruyère or mozzarella cheese, divided
  • 0.5 cup grated Parmesan cheese
  • 0.5 tsp Worcestershire sauce (optional)
  • optional garnish: fresh thyme, parsley, crispy fried onions

Instructions
 

  • Heat butter and olive oil in a large oven-safe skillet over medium heat. Add sliced onions, sugar, and salt. Cook 20–25 minutes, stirring occasionally, until onions are deeply golden and caramelized. Stir in garlic during the last minute.
  • Add dry orzo directly to the caramelized onions. Stir and cook for 2 minutes to lightly toast the pasta, enhancing flavor and helping it maintain texture.
  • Stir in shredded chicken, thyme, black pepper, and Worcestershire sauce. Mix to coat evenly in the onion mixture.
  • Pour in broth and cream. Stir to combine, then bring to a gentle simmer. Reduce heat, cover, and cook 8–10 minutes, stirring occasionally, until orzo is tender and most liquid absorbed.
  • Remove from heat and stir in 1 cup Gruyère and all the Parmesan until melted and creamy. Taste and adjust salt and pepper.
  • Preheat oven to 375°F (190°C). Sprinkle remaining ½ cup cheese on top. Bake uncovered for 10–15 minutes until bubbly and golden. For deeper color, broil for 2–3 minutes at the end.
  • Let casserole rest 5–10 minutes before serving. Garnish with fresh thyme or crispy onions if desired.
Keyword chicken orzo bake, comfort food recipes, easy casseroles, French onion casserole, gruyere chicken orzo, one-pan dinners