French Onion Chicken Orzo Casserole
A comforting one-pan casserole combining sweet caramelized onions, tender orzo, and juicy chicken, topped with gooey melted cheese.
Ingredients
For the onion base
- 2 tablespoons unsalted butter This adds a rich, creamy base to your casserole!
- 1 tablespoon olive oil Perfect for sautéing those onions to perfection!
- 2 large yellow onions, thinly sliced Sweet and savory, they become meltingly tender when caramelized.
- 1 teaspoon sugar Helps caramelize the onions quickly.
- 1/2 teaspoon salt Draws out moisture from the onions.
- 3 cloves garlic, minced Creates an irresistible aroma and depth of flavor.
For the casserole
- 1 1/2 cups orzo pasta Pairs perfectly with the creamy sauce.
- 2 cups cooked shredded chicken Rotisserie works well for convenience.
- 1/2 teaspoon dried thyme Adds herbaceous goodness.
- 1/4 teaspoon black pepper Rounds out the flavors.
- 2 cups low-sodium chicken broth Adds moisture and flavor.
- 1 cup heavy cream For a creamy texture.
- 1 1/2 cups shredded mozzarella cheese Melts beautifully into the dish.
- 1/2 cup grated Parmesan cheese Adds an extra bite of flavor.
- 1/2 teaspoon Worcestershire sauce or balsamic glaze (optional) Adds a splash of zing.
Instructions
Caramelize the Onions
- In a large oven-safe skillet or Dutch oven, melt the butter and olive oil over medium heat.
- Add the thinly sliced onions, sugar, and salt. Cook for 20–25 minutes, stirring occasionally, until deeply golden and caramelized.
- Stir in the minced garlic during the last 1–2 minutes for added aroma.
Add Orzo and Chicken
- Stir in the orzo and allow it to lightly toast for about 2 minutes.
- Add in the shredded chicken, dried thyme, black pepper, and Worcestershire sauce if using.
- Mix well, allowing all flavors to intermingle.
Pour in Liquids
- Pour in the chicken broth and cream, bringing everything to a gentle simmer.
- Reduce the heat to low, cover, and let it cook for 8–10 minutes, stirring occasionally.
Add Cheese
- Stir in 1 cup of mozzarella and the Parmesan cheese until melted.
Bake the Casserole
- Preheat your oven to 375°F (190°C).
- Sprinkle the remaining 1/2 cup of mozzarella over the top and bake uncovered for 10–15 minutes until bubbly and golden brown.
Serve
- Let the casserole rest for 5–10 minutes before serving.
- Garnish with fresh thyme or parsley, if desired.
Notes
Use rotisserie chicken for convenience. Be patient while caramelizing onions for the best flavor. This casserole can be prepped ahead and stores well for leftovers.