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French Onion Chicken Orzo Casserole

French onion chicken orzo casserole with deeply caramelized onions and creamy orzo baked until the Gruyere turns golden. A skillet-to-oven method keeps the cheese crust on top while the orzo cooks in the savory broth.
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Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Servings: 6 servings
Course: Main Dish
Cuisine: French-American
Calories: 620
Ingredients Equipment Method Notes

Ingredients
  

Chicken breast, diced
  • 1.5 lb chicken breast dice into bite-size pieces so it finishes baking in the casserole time
  • 0.25 salt to taste
  • 0.25 pepper to taste
Onion-garlic base
  • 2 large onions thinly sliced
  • 4 cloves garlic minced
  • 1 tsp dried thyme
  • 1 tbsp Worcestershire sauce
  • 3 tbsp unsalted butter use for caramelizing
Orzo and liquids
  • 1.5 cup orzo pasta uncooked
  • 3 cup beef broth
  • 1 cup dry white wine
  • 8 oz cream cheese cubed
Cheese topping
  • 2 cup Gruyere cheese shredded
  • 0.5 fresh thyme for garnish

Equipment

  • 1 cast iron skillet

Method
 

Prep and caramelize
  1. Preheat your oven to 375°F with a rack in the middle. Set out a large oven-safe skillet for the next steps.
  2. Melt the butter in a large oven-safe skillet over medium heat. Add the onions and cook 30–35 minutes, stirring occasionally, until deeply caramelized and browned at the edges.
Build the flavor
  1. Add the garlic and dried thyme and cook for 2 minutes, stirring so it doesn’t brown. The mixture should smell fragrant.
  2. Pour in the wine and cook for 2 more minutes. Let the liquid reduce slightly so the onions keep their deep flavor.
  3. Add the beef broth, Worcestershire sauce, and uncooked orzo, then stir to combine and distribute the pasta. Stir in the diced chicken until evenly mixed throughout.
Simmer and assemble
  1. Bring the mixture to a simmer over medium heat. Stir until the orzo starts absorbing liquid.
  2. Reduce to maintain a gentle simmer and stir in the cubed cream cheese until fully melted and creamy. Keep stirring until the sauce looks smooth.
  3. Season with salt and pepper to taste. Scatter the shredded Gruyere evenly over the top so it forms a golden crust while baking.
Bake
  1. Bake at 375°F for 25–30 minutes, uncovered. Bake until the orzo is cooked through, the chicken is done, and the cheese is golden and bubbly.
  2. Finish by garnishing with fresh thyme. Let the casserole rest for 5 minutes so it thickens slightly before serving.

Notes

Pro tip: slice the onions thin and give them the full 30–35 minutes so you get that deep French-onion sweetness before the orzo goes in. Refrigerate leftovers in a sealed container for up to 3 days; reheat in a 350°F oven until hot. Freezing is not recommended because the cream cheese sauce can separate when thawed. For a lighter swap, use reduced-fat cream cheese and reduce the Gruyere to 1 cup while keeping the same bake time.