This chicken tetrazzini casserole is packed with delicious flavors and textures. It has hearty chicken, tender mushrooms, peas, and pasta, all tossed in a creamy, rich sauce. The casserole is topped with crispy, buttery breadcrumbs and a sprinkle of Parmesan cheese with the most irresistible crunch and flavor.
Preheat oven to 350 degrees. Spray a 9x13-inch casserole dish with cooking spray and set aside. In a large pot, cook 16 ounces spaghetti pasta according to the directions until al dente. Drain and place in the prepared baking dish.
Add 1 tablespoon olive oil, 8 ounces mushrooms,3 garlic cloves, and 1 cup frozen peas in a medium-sized saucepan. Cook until tender. Whisk in the 2 tablespoons flour and cook for an additional minute.
Add the 2 cans (10 ounces) cream of chicken soup, 1 cup half and half, and 1 cup chicken broth to the saucepan. Add salt and pepper to taste. Let simmer until it starts to thicken. Add 2 cups chicken, and mix to incorporate.
Add the sauce to the spaghetti and toss until coated. Spread in your 9x13-inch pan.
Mix 1/2 cup parmesan cheese, 1/2 cup Italian seasoned bread crumbs, and 1/4 cup melted butter in a bowl. Spread the mixture on top of the casserole.
Bake for 30-40 minutes until heated through, and the bread crumbs are brown on top.
Notes
Originally Posted Nov 9, 2017Updated September 4, 2024