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French Onion Chicken Orzo Casserole

French Onion Chicken Orzo Casserole

This French Onion Chicken Orzo Casserole is the ultimate comfort food, combining tender chicken, orzo pasta, and the irresistible flavors of caramelized onions and Gruyere cheese into one easy, satisfying meal. It's the perfect solution for busy weeknights when you crave a delicious homemade dinner without the fuss.
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Prep Time 30 minutes
Cook Time 45 minutes
Resting Time 5 minutes
Total Time 1 hour 15 minutes
Servings: 4 servings
Course: Main Course
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

  • 1.5 pounds boneless, skinless chicken breasts or thighs, cut into 1-inch pieces
  • 2 tablespoons olive oil
  • 2 large yellow onions, thinly sliced
  • 2 cloves garlic, minced
  • 1 teaspoon dried thyme
  • 0.5 teaspoon salt, plus more to taste
  • 0.25 teaspoon black pepper, plus more to taste
  • 4 cups chicken broth
  • 1.5 cups orzo pasta
  • 0.5 cup heavy cream
  • 0.5 cup grated Gruyere cheese, plus more for topping
  • 0.25 cup grated Parmesan cheese
  • fresh parsley, chopped, for garnish (optional)
  • baguette slices, for serving (optional)

Equipment

  • Large Oven-Safe Skillet or Dutch Oven

Method
 

  1. Heat the olive oil in a large, oven-safe skillet or Dutch oven over medium-high heat. Add the chicken pieces and cook until browned on all sides, about 5-7 minutes. Season with salt and pepper. Remove the chicken from the skillet and set aside.
    2 tablespoons olive oil, 1.5 pounds boneless, skinless chicken breasts or thighs, cut into 1-inch pieces, 0.5 teaspoon salt, plus more to taste, 0.25 teaspoon black pepper, plus more to taste
  2. Reduce the heat to medium-low. Add the thinly sliced onions to the same skillet. Cook slowly, stirring occasionally, until the onions are deeply golden brown and caramelized, about 20-25 minutes. This slow caramelization is key to developing that classic French onion flavor. Add the minced garlic and dried thyme during the last minute of cooking, stirring until fragrant.
    2 large yellow onions, thinly sliced, 2 cloves garlic, minced, 1 teaspoon dried thyme
  3. Pour in the chicken broth and scrape up any browned bits from the bottom of the skillet. Bring the broth to a simmer. Stir in the orzo pasta, ensuring it's submerged in the liquid.
    4 cups chicken broth, 1.5 cups orzo pasta
  4. Return the browned chicken pieces to the skillet. Bring the mixture back to a gentle simmer, then cover and cook for 10-12 minutes, or until the orzo is al dente and has absorbed most of the liquid. Stir occasionally to prevent sticking.
    1.5 pounds boneless, skinless chicken breasts or thighs, cut into 1-inch pieces
  5. Stir in the heavy cream, grated Gruyere cheese, and grated Parmesan cheese. Stir until the cheeses are melted and the sauce is creamy. Season with additional salt and pepper to taste.
    0.5 cup heavy cream, 0.5 cup grated Gruyere cheese, plus more for topping, 0.25 cup grated Parmesan cheese, 0.5 teaspoon salt, plus more to taste, 0.25 teaspoon black pepper, plus more to taste
  6. Preheat your broiler. Sprinkle a little extra Gruyere cheese over the top of the casserole. Place the skillet under the broiler for 1-2 minutes, watching very carefully, until the cheese is melted and bubbly and lightly golden brown.
    0.5 cup grated Gruyere cheese, plus more for topping
  7. Let the casserole rest for a few minutes before serving. Garnish with fresh chopped parsley, if desired. Serve hot, perhaps with slices of crusty baguette for dipping into the delicious sauce.
    fresh parsley, chopped, for garnish (optional), baguette slices, for serving (optional)

Notes

This casserole stores beautifully. Refrigerate leftovers in an airtight container for up to 3-4 days. Reheat in the oven at 350°F (175°C) for 15-20 minutes, or microwave on medium power for 1-2 minutes.