Tarragon Chicken Casserole

4 stars
4.00 (11)
Tarragon Chicken Casserole
Prep Time:
10 mins
Cook Time:
25 mins
Total Time:
Recipe by Administrator
Published on May 26, 2023


  • 2 tablespoons olive oil
  • 1 onion, finely chopped
  • 2 cloves garlic, minced
  • 8 ounces mushrooms, sliced
  • 2 tablespoons chopped fresh tarragon
  • 1 teaspoon dried oregano
  • 1/2 teaspoon dried thyme
  • 1/4 teaspoon freshly ground black pepper
  • 3 tablespoons all-purpose flour
  • 2 cups chicken broth
  • 1/2 cup sour cream
  • 2 cups cooked chicken, diced
  • 1/2 cup shredded cheddar cheese
  • 1 cup dry bread crumbs


  1. Preheat oven to 350 degrees F (175 degrees C).
  2. Heat the olive oil in a large skillet over medium heat. Add the onion and garlic and sauté until the onion is softened, about 5 minutes. Stir in the mushrooms and cook until tender, about 5 minutes more. Add the tarragon, oregano, thyme, and pepper and cook for 1 minute more.
  3. Stir in the flour and cook for 1 minute. Gradually stir in the chicken broth and bring the mixture to a boil. Reduce the heat and simmer until thickened, about 5 minutes. Remove from the heat and stir in the sour cream.
  4. Add the chicken to the sauce and mix well. Pour the mixture into a 9x13 inch baking dish. Sprinkle the cheese and bread crumbs on top. Bake for 20 minutes, or until the cheese is melted and the casserole is heated through.

Interesting Facts

  • Tarragon is a fragrant herb with a slightly sweet, anise-like flavor.
  • This casserole can be made ahead of time and refrigerated until ready to bake.
  • This casserole can be frozen for up to 3 months.