This Chicken Tetrazzini Casserole is a creamy, comforting dish that’s perfect for cozy dinners or feeding a crowd. With tender chicken, spaghetti, and mushrooms all baked together in a rich, cheesy sauce, this casserole is a classic comfort food that’s easy to prepare. The buttery breadcrumbs on top give it a satisfying crunch, making each bite irresistible. It’s a great way to use up leftover chicken and can easily be made ahead, making it ideal for busy weeknights or family gatherings.
Ingredients:
- 12 oz spaghetti
- 3 cups cooked chicken, shredded or diced
- 1/2 cup butter, divided
- 1/2 cup onion, diced
- 1/2 cup mushrooms, sliced
- 2 cloves garlic, minced
- 1/4 cup all-purpose flour
- 2 cups chicken broth
- 1 cup heavy cream
- 1/2 cup sour cream
- 1 cup grated Parmesan cheese, divided
- 1/2 teaspoon salt
- 1/2 teaspoon black pepper
- 1/4 teaspoon nutmeg
- 1 cup shredded mozzarella cheese
- 1/2 cup breadcrumbs
- 2 tablespoons fresh parsley, chopped (optional)
Instructions:
- Preheat the oven to 350°F (175°C). Grease a 9×13-inch baking dish.
- Cook the spaghetti according to package instructions until al dente. Drain and set aside.
- In a large skillet, melt 1/4 cup of butter over medium heat. Add the onion, mushrooms, and garlic, and sauté until softened, about 5 minutes.
- Sprinkle the flour over the vegetables and cook, stirring, for 1 minute. Slowly whisk in the chicken broth and bring to a simmer, allowing the sauce to thicken.
- Stir in the heavy cream, sour cream, 1/2 cup of Parmesan, salt, pepper, and nutmeg. Continue to cook until the sauce is smooth and creamy.
- Add the cooked chicken and spaghetti to the sauce, stirring to combine. Transfer the mixture to the prepared baking dish.
- In a small bowl, melt the remaining butter and mix with breadcrumbs and the remaining Parmesan. Sprinkle the breadcrumb mixture evenly over the top of the casserole.
- Bake for 25-30 minutes, or until the top is golden and the casserole is bubbly. Sprinkle with fresh parsley before serving, if desired.
Enjoy your delicious Chicken Tetrazzini Casserole!
