Oh, friends, there’s nothing quite like a bubbling, golden Creamy Chicken Tetrazzini Casserole emerging from the oven on a busy weeknight. This dish isn’t just dinner; it’s a warm hug in a bowl, a symphony of tender chicken, al dente spaghetti, and a rich, velvety sauce that whispers comfort with every bite. It truly brings that magical feeling of a home-cooked meal to your table, even when time is short.
I remember countless afternoons in Grandma’s kitchen, the air thick with the scent of simmering sauces and baking treats. While her specialty was often sweet, the spirit of creating something delicious and comforting from simple ingredients always resonated. Learning to layer flavors, to understand how a humble roux could transform into something extraordinary – these are the lessons that built recipesdessert.net, and they’re what I bring to every recipe I share with you.
This Creamy Chicken Tetrazzini Casserole is a testament to that philosophy. It’s incredibly easy to prepare, making it a perfect family-friendly meal for those hectic evenings, and it brings everyone together around the table. My top tip? Always taste your sauce before it goes into the casserole – a little adjustment can make all the difference!

What You Need to Make This Recipe
Crafting this delightful casserole requires a few simple yet essential ingredients to build its signature flavor. Boneless, skinless chicken breasts provide lean protein, while a rich blend of butter, flour, chicken broth, and heavy cream creates the luscious, creamy sauce that defines a perfect Creamy Chicken Tetrazzini Casserole. You’ll find the complete list of ingredients and precise measurements ready for you in the recipe card below.
How to Make Creamy Chicken Tetrazzini Casserole
Whipping up this cozy Creamy Chicken Tetrazzini Casserole is a breeze, truly! We’ll start by preparing our chicken and cooking the spaghetti until it’s perfectly al dente. Next, we’ll build that incredibly rich, creamy sauce, bustling with mushrooms and garlic, before combining everything into a comforting medley. A quick assembly in a baking dish, a sprinkle of cheesy goodness, and then it’s off to the oven for that golden, bubbly perfection we all adore.

Creamy Chicken Tetrazzini Casserole
Ingredients
Equipment
Method
- Preheat your oven to 375°F (190°C). Grease a 9×13 inch baking dish with butter or cooking spray.
- If using raw chicken breasts, cook them now: In a large pot, bring salted water to a boil. Add the chicken breasts and cook for 15-20 minutes, or until cooked through. Remove, let cool slightly, then shred or dice. Set aside.
- In the same pot of boiling salted water, add the broken spaghetti. Cook according to package directions until al dente. Drain well and toss with 1 tsp olive oil to prevent sticking. Set aside.
- In a large skillet or Dutch oven, melt 4 tablespoons of unsalted butter over medium heat. Add the diced yellow onion and cook until softened, about 5-7 minutes.
- Add the sliced mushrooms to the skillet and cook, stirring occasionally, until they release their liquid and start to brown, about 5-8 minutes. Stir in the minced garlic and cook for another minute until fragrant.
- Sprinkle the flour over the vegetables and stir continuously for 1 minute to cook out the raw flour taste.
- Gradually whisk in the chicken broth, then the heavy cream, ensuring no lumps form. Bring the mixture to a gentle simmer, stirring frequently, until the sauce thickens, about 5-7 minutes.
- Remove the skillet from the heat. Stir in 1/2 cup grated Parmesan cheese, dry white wine (if using), dried Italian seasoning, 1/2 tsp salt, and 1/4 tsp black pepper. Taste and adjust seasoning as needed.
- In a large mixing bowl, combine the cooked spaghetti, shredded chicken, frozen green peas, and chopped fresh parsley. Pour the creamy sauce over the mixture and toss gently until everything is evenly coated.
- Transfer the chicken and pasta mixture into the prepared 9×13 inch baking dish, spreading it out evenly.
- In a small bowl, combine the panko breadcrumbs and 2 tablespoons of melted unsalted butter. Sprinkle this mixture evenly over the top of the casserole.
- Bake for 25-30 minutes, or until the casserole is bubbly around the edges and the panko topping is golden brown and crispy.
- Remove from oven and let rest for 5-10 minutes before serving. Garnish with additional fresh parsley or Parmesan cheese, if desired.
Notes
Pro Tips for Making This Creamy Chicken Tetrazzini Casserole
Making a truly exceptional Creamy Chicken Tetrazzini Casserole isn’t complicated, but a few simple tricks I’ve learned over the years can elevate it from good to absolutely unforgettable.
Perfectly Cooked Pasta: Don’t overcook your spaghetti or linguine! It will continue to cook in the oven, so aim for slightly under al dente initially. This ensures it holds its texture and doesn’t get mushy. My Grandma always said, “A little bite is a good sign!”
Building Flavor: Sauté your onions and mushrooms until they are deeply golden and caramelized. This step is crucial for developing a rich, savory base for your creamy sauce. I often let them go just a minute longer than I think I should, and it always pays off in flavor.
My Secret Trick: When adding your cheese, always reserve a little extra grated Parmesan to sprinkle on top during the last 10 minutes of baking. It creates a beautiful, golden crust and intensifies that cheesy flavor in the Creamy Chicken Tetrazzini Casserole without it melting completely into the sauce too early.
Don’t Skip the Wine: A splash of dry white wine adds a wonderful depth of flavor and brightness to the sauce that you just can’t quite achieve with broth alone. It really makes the creamy sauce sing!
Fun Variations for Creamy Chicken Tetrazzini Casserole
One of the most joyful parts of home baking and cooking is the freedom to get creative, and this Creamy Chicken Tetrazzini Casserole is wonderfully adaptable! Don’t be shy about making it your own.
Veggie Boost
My friend Sarah always asks me to add extra vegetables when I make this. For a fantastic nutritional boost, consider stirring in some steamed broccoli florets, sliced bell peppers, or even a handful of spinach right before baking. They add lovely color and extra goodness to this comforting dish.
Protein Swaps
While chicken is classic, this casserole is just as delicious with other proteins. You could easily swap the chicken for cooked turkey (perfect for Thanksgiving leftovers!), or even use a mix of cooked shrimp and scallops for a delightful seafood tetrazzini.
Spice it Up!
If you enjoy a little kick, a pinch of red pepper flakes stirred into the sauce can add a subtle warmth. A smoky twist can also be achieved by adding a teaspoon of smoked paprika alongside the Italian seasoning for a different flavor profile in your Creamy Chicken Tetrazzini Casserole.

What to Serve With Creamy Chicken Tetrazzini Casserole
When you’ve got a dish as comforting and rich as a Creamy Chicken Tetrazzini Casserole, thinking about what to serve alongside it is all about balancing those wonderful flavors. I always think about enhancing the meal without overshadowing the star.
Crisp Green Salad: A simple, vibrant green salad with a light vinaigrette is my go-to. The fresh, crisp greens offer a lovely contrast to the creamy pasta and chicken, making each bite feel lighter and brighter.
Garlic Bread: Oh, who can resist a warm, crusty piece of garlic bread? It’s perfect for soaking up any extra delicious sauce and truly rounds out the meal. My kids always devour it!
Roasted Asparagus: For a touch of elegance, roasted asparagus spears, simply seasoned with a little olive oil, salt, and pepper, add a lovely tenderness and earthy flavor that complements the casserole beautifully.
Steamed Green Beans: Sometimes, I just want something quick and simple. Steamed green beans, tossed with a pat of butter, are a fantastic, effortless side that adds freshness and a pop of color to your plate.
How to Store Creamy Chicken Tetrazzini Casserole
Keeping your delicious Creamy Chicken Tetrazzini Casserole fresh means more joyful meals later! It’s a fantastic dish for meal prep or enjoying leftovers, and I always ensure it’s stored correctly to maintain its lovely flavors and texture.
Refrigerator Storage
Once cooled, transfer any leftover Creamy Chicken Tetrazzini Casserole into an airtight container. It will keep beautifully in the refrigerator for up to 3-4 days. When reheating, I like to add a splash of milk or chicken broth to help loosen the sauce and keep it from drying out, warming it gently in the microwave or oven until heated through.
Freezer Friendly
For longer storage, this casserole freezes wonderfully! Divide cooled leftovers into freezer-safe containers or wrap individual portions tightly in plastic wrap and then foil. It can be stored in the freezer for up to 2-3 months. Thaw overnight in the refrigerator before reheating. My personal tip for reheating frozen casseroles is to always cover them loosely with foil in the oven to prevent the top from getting too crispy before the inside is warmed through.
Nutritional Benefits
While undoubtedly a comfort food, this Creamy Chicken Tetrazzini Casserole also offers some wholesome goodness! With lean boneless, skinless chicken breasts, it’s a wonderful source of protein, essential for building and repairing tissues. Plus, the mushrooms add a touch of fiber and important vitamins, proving that a satisfying treat can still be nourishing.
FAQs
Faq 1
Can I prepare Creamy Chicken Tetrazzini Casserole ahead of time?
Absolutely! You can assemble the entire casserole, cover it tightly, and refrigerate it for up to 24 hours before baking. Just add an extra 10-15 minutes to the baking time if baking directly from the fridge.
Faq 2
What kind of pasta works best for Creamy Chicken Tetrazzini Casserole?
Spaghetti or linguine are traditional, offering that classic long noodle texture. However, you can also use other pasta shapes like fettuccine, penne, or even rotini if that’s what you have on hand for your Creamy Chicken Tetrazzini Casserole.
Faq 3
Can I make this Creamy Chicken Tetrazzini Casserole gluten-free?
Yes, easily! Simply use your favorite gluten-free spaghetti or pasta and ensure your chicken broth and flour are certified gluten-free. The rest of the ingredients in this Creamy Chicken Tetrazzini Casserole are typically naturally gluten-free.
Faq 4
How do I prevent the sauce from being too thin or thick?
The key is to adjust the amount of chicken broth or heavy cream slightly while simmering the sauce. If too thick, add more broth; if too thin, let it simmer a little longer to reduce, ensuring your Creamy Chicken Tetrazzini Casserole has perfect consistency.
And there you have it, sweet friends! This Creamy Chicken Tetrazzini Casserole isn’t just a recipe; it’s an invitation to gather your loved ones around the table, to share stories, and to create new cherished memories. Baking and cooking from scratch, with a little love and patience, truly transforms simple ingredients into something magical. I hope you find as much joy in making and sharing this comforting dish as I do! Happy baking!