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French Onion Chicken Orzo Casserole

French Onion Chicken Orzo Casserole is a one-skillet bake with deeply caramelized onions, creamy orzo, and a golden Gruyère top. Diced chicken simmers right in the broth and wine base, then finishes in the oven until bubbly and browned.
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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: 630
Ingredients Equipment Method Notes

Ingredients
  

Chicken filling
  • 1.5 lb chicken breast Dice into bite-size pieces so it cooks through by the time the orzo is tender.
  • 2 onions Slice thinly for proper caramelization.
  • 4 clove garlic Minced for even flavor distribution.
  • 1.5 cup orzo pasta Uncooked; cooks in the broth mixture during the bake.
  • 3 cup beef broth Use low-sodium if you prefer to control salt.
  • 1 cup dry white wine Adds tang and depth as it reduces.
  • 8 oz cream cheese Cubed so it melts smoothly.
  • 1 tsp dried thyme Dry thyme for classic French onion flavor.
  • 1 tbsp Worcestershire sauce Adds savory, umami depth.
  • 3 tbsp unsalted butter Used to caramelize the onions.
  • 2 cup Gruyere cheese Shred for a golden, melty top.
  • 1 fresh thyme For garnish.
  • 0.25 salt and pepper Season to taste, at minimum after the simmer step.

Equipment

  • 1 cast iron skillet
  • 1 sheet pan

Method
 

Preheat and caramelize
  1. Preheat oven to 375F.
  2. Melt butter in a large oven-safe skillet over medium heat, then add onions and cook 30-35 minutes until deeply caramelized, stirring occasionally.
Build flavor base
  1. Add garlic and thyme and cook 2 minutes until fragrant.
  2. Add wine and cook 2 minutes, scraping up any browned bits.
Cook until creamy
  1. Stir in beef broth, Worcestershire sauce, and uncooked orzo, then add diced chicken.
  2. Bring the mixture to a simmer, then stir in cream cheese until fully melted and creamy.
  3. Season with salt and pepper to taste.
  4. Scatter Gruyere over the top in an even layer.
Bake and finish
  1. Bake 25-30 minutes until the orzo is cooked, the chicken is done, and the cheese is golden.
  2. Garnish with fresh thyme and rest briefly before serving for clean slices and less runniness.

Notes

Pro tip: caramelize the onions until they’re truly deep amber; that’s what gives the casserole its rich French onion flavor. Store leftovers in an airtight container in the fridge for 3-4 days; reheat gently until warmed through. Freezing is not recommended because the cream cheese and pasta texture can soften after thawing. For a lighter option, use reduced-fat cream cheese and 1 cup less broth to keep the sauce creamy without thinning.