Creamy Chicken Tetrazzini (The Ultimate Comfort Casserole)
This creamy Chicken Tetrazzini is the ultimate comfort food casserole, loaded with tender chicken, spaghetti, mushrooms, and a rich, cheesy sauce. Perfect for weeknight dinners, potlucks, or using up leftover turkey!
The Creamiest Chicken Tetrazzini You Will Ever Make
If there is one casserole that delivers pure, soul-warming comfort from the very first bite, it is Chicken Tetrazzini. Think tender strands of spaghetti tangled up in a velvety, cheesy sauce with juicy chicken, golden mushrooms, and a crispy, buttery breadcrumb topping that crackles when you scoop into it. It is the kind of dish that makes people go quiet at the dinner table because they are too busy eating to talk.
This is not just a weeknight dinner. This is the casserole you bring to potlucks, the one you bake for a friend who just had a baby, and honestly, the most delicious reason to look forward to Thanksgiving leftovers. If you have ever searched for What To Make With Leftover Turkey Linguine or stumbled across a classic Turketti Casserole recipe around the holidays, this is the version you want bookmarked.
Good technique and quality ingredients are what separate a truly great Tetrazzini from one that turns out gluey or bland. Using a heavy-bottomed skillet for the sauce, freshly grated Parmesan, and full-fat dairy will make a noticeable difference in the final dish.
Where Does Chicken Tetrazzini Come From?
Despite its Italian-sounding name, Chicken Tetrazzini is a thoroughly American invention, believed to have been created in the early 1900s in San Francisco and named after the famous Italian opera soprano Luisa Tetrazzini. The original used turkey or chicken in a buttery, sherry-laced cream sauce over pasta, usually finished with Parmesan.
Over the decades, it became a beloved staple of church cookbooks, community potlucks, and holiday tables across the country. The Taste of Home Turkey Tetrazzini version and the iconic Turkey Linguine casserole served at family gatherings every November are both direct descendants of this classic dish.
Today it is just as popular as ever, and for good reason: it feeds a crowd, reheats beautifully, and can be made ahead with almost no effort.
Tips for the Best Chicken Tetrazzini
A few small details make a big difference with this recipe:
- Undercook the pasta slightly. It will finish cooking in the oven, so pulling it out 1-2 minutes early prevents it from turning mushy.
- Sear the mushrooms without crowding the pan. Give them space and do not stir too early. You want golden, caramelized edges, not steamed, rubbery pieces.
- Soften the cream cheese fully before adding it to the sauce. Cold cream cheese will leave lumps that are hard to whisk out.
- Taste the sauce before assembling. This is your one best chance to adjust the seasoning before everything goes into the dish.
Chef's Tip: A splash of dry sherry is the secret ingredient in any great Tetrazzini. It adds a subtle nuttiness that rounds out the sauce beautifully. If you do not have sherry, a dry white wine works just as well.
Using Leftover Turkey? Make a Turketti Casserole
This recipe is practically made for holiday leftovers. Simply swap in shredded cooked turkey for the chicken in equal amounts, and you have a classic Turkey Tetrazzini Casserole that puts every last bit of your roast bird to delicious use. This version goes by many names including One-Pot Turkey Tetrazzini, Turkey Tettrazini Casserole, and even 21 Day Turkey Tetrazzini (because it is so good you will want it on repeat for weeks). The flavors are rich, the texture is creamy, and no one will ever guess it started as leftovers.
Ready to get into it? Here is everything you need to make this recipe at home:
Creamy Chicken Tetrazzini (The Ultimate Comfort Casserole)
This creamy Chicken Tetrazzini is the ultimate comfort food casserole, loaded with tender chicken, spaghetti, mushrooms, and a rich, cheesy sauce. Perfect for weeknight dinners, potlucks, or using up leftover turkey!
Ingredients
- 12 oz spaghetti or linguine, broken in half
- 3 cups cooked chicken breast, shredded or cubed; rotisserie or leftover turkey works great
- 4 tbsp unsalted butter, divided
- 1 yellow onion, finely diced
- 2 celery stalks, finely sliced
- 4 garlic cloves, minced
- 8 oz cremini or white button mushrooms, sliced
- 3/8 cup all-purpose flour
- 2 cups chicken broth, low sodium preferred
- 1 cup whole milk
- 1/2 cup sour cream, full fat for best texture
- 4 oz cream cheese, softened and cubed
- 1/4 cup dry sherry or white wine, optional but recommended
- 1 cup frozen peas, thawed
- 1 cup shredded Parmesan cheese, divided
- 1 cup shredded mozzarella cheese
- 1 tsp salt, or to taste
- 1/2 tsp black pepper, freshly ground
- 1 tsp Italian seasoning
- 1/2 cup panko breadcrumbs, for topping
- 1 tbsp olive oil or melted butter, for tossing with breadcrumbs
Instruction
Preheat your oven to 375 degrees F (190 degrees C). Grease a 9x13 inch baking dish with butter or nonstick spray and set aside.
Cook the pasta in a large pot of well-salted boiling water until just shy of al dente, about 1-2 minutes less than package directions. Drain and set aside.
In a large, deep skillet or Dutch oven, melt 2 tablespoons of butter over medium-high heat. Add the sliced mushrooms in a single layer and cook undisturbed for 3-4 minutes until golden. Stir and cook another 2 minutes. Remove mushrooms to a plate and set aside.
Reduce heat to medium. In the same skillet, melt the remaining 2 tablespoons of butter. Add the diced onion and celery and cook for 4-5 minutes until softened. Add the garlic and cook for 1 minute more until fragrant.
Sprinkle the flour over the vegetables and stir constantly for 1-2 minutes to cook out the raw flour taste.
If using, pour in the dry sherry or white wine and stir vigorously, scraping up any browned bits from the bottom of the pan. Cook for 1 minute.
Gradually whisk in the chicken broth and milk, a little at a time, ensuring no lumps form. Bring to a gentle simmer over medium heat, stirring frequently, until the sauce thickens enough to coat the back of a spoon, about 5-6 minutes.
Reduce heat to low. Add the softened cream cheese cubes and stir until fully melted and smooth. Stir in the sour cream, Italian seasoning, salt, and pepper. Taste and adjust seasoning as needed.
Remove the skillet from heat. Stir in the cooked chicken, sauteed mushrooms, thawed peas, cooked pasta, three-quarters of the Parmesan, and all of the mozzarella. Fold everything together gently until evenly combined.
Transfer the mixture to the prepared baking dish and spread it into an even layer.
In a small bowl, toss the panko breadcrumbs with the olive oil or melted butter and the remaining Parmesan. Scatter the breadcrumb mixture evenly over the top of the casserole.
Bake uncovered for 25-30 minutes until the top is golden brown and the casserole is bubbling around the edges.
Let the casserole rest for 5-10 minutes before serving. Garnish with fresh parsley if desired.
Equipment
- 9x13 inch baking dish
- Large pot for pasta
- Large deep skillet or Dutch oven
- Whisk
- Colander
- Large mixing spoon or spatula
- Small mixing bowl
Notes
Serving, Storing, and Making It Ahead
Chicken Tetrazzini is incredibly flexible when it comes to timing.
To serve: Let the casserole rest for at least 5 minutes after pulling it from the oven. This helps the sauce set slightly so your portions scoop out cleanly. A sprinkle of fresh parsley and an extra shower of Parmesan on top never hurt anything.
To store: Leftovers keep in an airtight container in the refrigerator for up to 4 days. Reheat covered in a 350 degree oven or in the microwave with a splash of broth to keep it creamy.
To freeze: Assemble the casserole without the breadcrumb topping, wrap it tightly, and freeze for up to 2 months. Thaw overnight in the fridge, add the breadcrumbs, and bake as directed.
To make ahead: This is one of the best make-ahead casseroles out there. Assemble it the night before (minus the breadcrumbs), refrigerate, and bake the next day. It is a complete lifesaver for the holidays or anytime you need a stress-free dinner.
