Turkey Tetrazzini is an exquisite, creamy, and cheesy pasta bake that truly elevates humble leftover turkey into a dazzling post-holiday crowd-pleaser. Infused with aromatic herbs and a rich, velvety sauce, this casserole promises a comforting and deeply satisfying meal that your entire family will adore. Forget boring post-holiday meals; this recipe transforms your Thanksgiving or Christmas turkey into a brand new, irresistible dish.

The Ultimate Turkey Tetrazzini: A Post-Holiday Tradition

There’s a secret joy many of us share when the holiday feast is over: the anticipation of leftovers. While the main event, be it Thanksgiving or Christmas dinner, is undoubtedly special, the creative possibilities that emerge from a well-stocked fridge of remnants can be just as exciting. I’ll readily admit it: sometimes, I’m even more thrilled for the leftovers than the feast itself!

Who’s with me on this? Think about the delightful array of options that leftover turkey presents. We can whip up classic Turkey Sliders, a refreshing Turkey Salad, quick and convenient Wraps, or a gloriously loaded Turkey Sandwich. Each offers its own charm, but for a truly transformative and deeply satisfying experience, there’s one dish that stands head and shoulders above the rest: Turkey Tetrazzini.

This creamy, flavorful pasta bake has cemented its place as a cherished post-Thanksgiving tradition in our home. It’s an effortlessly delicious method for utilizing every last bit of that succulent holiday turkey, particularly when you have lingering guests enjoying the festive season. The rich, savory flavors and comforting texture make it an absolute favorite, consistently earning rave reviews from everyone who tries it. It’s not just a meal; it’s a culinary embrace that brings warmth and joy to the table.

What is Turkey Tetrazzini?

Turkey Tetrazzini is a classic American casserole, famously named after the Italian opera singer Luisa Tetrazzini. While its namesake might be Italian, the dish itself is believed to have originated in American kitchens in the early 20th century, specifically tailored to use leftover poultry. At its heart, Tetrazzini is a baked pasta dish, typically featuring spaghetti or other long pasta, combined with diced poultry (often turkey or chicken), mushrooms, and sometimes peas, all enveloped in a rich, creamy, cheese-laden sauce, and topped with more cheese and breadcrumbs for a delightful crispy crust.

Our Turkey Tetrazzini recipe takes this beloved classic and makes it approachable and incredibly flavorful. It’s designed to maximize the deliciousness of your holiday leftovers, turning them into a comforting, cohesive meal that feels entirely new. The magic lies in the balance of textures and flavors: tender pasta, juicy turkey, earthy mushrooms, and sweet peas all swimming in a savory, herb-infused cream sauce. Baked to golden perfection, it creates a dish that is both elegant and wonderfully homey.

Key Ingredients for an Unforgettable Turkey Tetrazzini

Crafting the perfect Turkey Tetrazzini begins with selecting high-quality ingredients that build layers of flavor and texture. Here’s a closer look at what makes this dish truly special:

• Spaghetti: While any long pasta works, spaghetti is traditional. Breaking it in half before cooking is a brilliant tip; it makes the pasta much easier to manage when mixing with the sauce and serving. Ensure you cook it al dente as it will continue to cook slightly in the oven.
• Unsalted Butter: This forms the foundation of our creamy sauce. Using unsalted butter allows you precise control over the overall saltiness of your dish, which is crucial when incorporating salty elements like chicken broth and cheese.
• Baby Bella Mushrooms: These offer a wonderful earthy flavor and a “meaty” texture that complements the turkey beautifully. You can easily substitute with white button mushrooms, cremini, or even a wild mushroom blend for a more gourmet touch. Sautéing them until golden brown enhances their umami depth.
• Yellow Onion: Finely diced yellow onion adds a subtle sweetness and aromatic depth to the sauce, creating a rich flavor base. It’s a fundamental component of many savory dishes for a reason!
• All-Purpose Flour: This is essential for creating a roux, which thickens our sauce to a luxurious, creamy consistency. It binds with the butter and liquid to prevent a watery casserole.
• Low-Sodium Chicken Broth: Using low-sodium broth is another key step in managing the seasoning. It provides savory liquid without overwhelming the dish with salt, giving you the flexibility to adjust to your taste.
• Half and Half: This dairy product is the secret to Tetrazzini’s signature creamy texture. It strikes a perfect balance between richness and lightness. For a lighter version, you can swap it for milk, or for an intensely rich and decadent sauce, use heavy cream.
• Seasonings: Fresh herbs are always fantastic, but dried herbs work wonderfully too. We recommend a blend of garlic powder, onion powder, dried thyme, and dried parsley for a classic, aromatic profile. A touch of ground mustard adds an unexpected but delightful tang that brightens the entire dish. Don’t forget salt and freshly ground black pepper to taste.
• Sharp Cheddar Cheese: Grating your own fresh cheese is highly recommended. Pre-shredded cheeses often contain anti-caking agents that can prevent smooth melting. Sharp cheddar delivers a bold, tangy flavor that cuts through the richness of the sauce, but you could also use mozzarella, Parmesan, or Gruyère for different flavor profiles.
• Leftover Cooked Turkey: This is the star of the show! Diced leftover turkey is perfect. If you don’t have turkey, cooked chicken (like rotisserie chicken) works equally well, making this a versatile recipe for any time of year.
• Frozen Peas: These bright green morsels add a pop of color, a hint of sweetness, and a lovely tender texture. They can be added straight from the freezer, making preparation quick and easy.

How to Master Turkey Tetrazzini: Step-by-Step Guide

Making this incredible Turkey Tetrazzini is simpler than you might think. Follow these detailed steps for a perfect, creamy casserole every time:

1. Prepare Your Pasta: Begin by preheating your oven to 325°F (160°C) and lightly greasing a 9×13-inch ceramic baking pan. Set it aside. In a large pot, bring about 12 cups of water to a rolling boil. Add a generous tablespoon of salt to the boiling water, then add the spaghetti, which you’ve snapped in half. Cook the spaghetti for one minute less than the package directions suggest; this ensures it’s perfectly al dente and won’t get mushy during baking. Drain the pasta thoroughly and spread it out to cool, tossing occasionally to prevent it from sticking together.
2. Sauté the Aromatics: In a separate large pot or Dutch oven, melt the unsalted butter over high heat. Once melted and shimmering, add the thinly sliced mushrooms. Cook, stirring frequently, for about 4 minutes until they begin to soften and release their moisture. The key here is to get some nice browning on the mushrooms to develop their deep, savory flavor.
3. Build the Flavor Base: Add the finely diced yellow onion to the pot with the mushrooms. Continue cooking for another 3-5 minutes, stirring occasionally, until the mushrooms are golden brown and the onions have become translucent and softened. This aromatic base is crucial for the overall flavor of your tetrazzini.
4. Create the Roux and Sauce: Reduce the heat to medium. Sprinkle the all-purpose flour over the mushroom and onion mixture. Stir constantly for 1 minute to cook out the raw flour taste, creating a light roux. Gradually pour in 1-1/2 cups of the half-and-half, whisking continuously to prevent lumps. The sauce should begin to thicken quickly, usually within about 30 seconds.
5. Develop the Creamy Sauce: Now, add the chicken broth, the remaining 1-1/2 cups of half-and-half, and all your seasonings: garlic powder, onion powder, dried thyme, dried parsley, and ground mustard (if using). Season with salt and pepper to taste; a good starting point is 3/4 teaspoon of salt and 1/2 teaspoon of pepper, but adjust as needed. Continue to cook and stir occasionally until the sauce thickens to the point where it leaves a visible trail on the back of a spoon (this is known as nappe consistency). It doesn’t need to be extremely thick at this stage, as it will continue to thicken slightly after other ingredients are added and during baking. Whisk and scrape the bottom of the pot frequently to prevent any flour from settling and burning.
6. Combine and Bake: Turn off the heat. Stir in half of the freshly shredded sharp cheddar cheese until it’s just combined and melted into the sauce. Add the cooked spaghetti, diced cooked turkey, and frozen peas to the pot. Stir gently until all the ingredients are thoroughly coated in the creamy sauce. Taste the mixture and adjust seasonings if necessary. Transfer the entire mixture to your prepared 9×13-inch baking pan, spreading it into an even layer.
7. The Golden Finish: Top the casserole with the remaining sharp cheddar cheese. For an optional extra layer of texture and flavor, prepare the panko breadcrumb topping (see note below) and sprinkle it evenly over the cheese. Bake the Tetrazzini for 20-25 minutes, or until the cheese is bubbly and beautifully golden brown on top. Optionally, garnish with fresh thyme sprigs before serving immediately.

Perfect Pairings: What to Serve With Turkey Tetrazzini

Turkey Tetrazzini is a hearty, fulfilling meal on its own, but pairing it with the right side dishes can elevate the dining experience. Here are some fantastic options to complement its creamy richness:

• A crisp garden salad with a light vinaigrette dressing. The freshness and acidity of the salad provide a wonderful contrast to the rich pasta.
• Steamed or roasted vegetables are an excellent choice. Consider simple broccoli, tender green beans, or savory Brussels sprouts. Roasting brings out their natural sweetness and a slight crispness.
• Warm garlic bread or soft, fluffy dinner rolls are essential for soaking up every last drop of the decadent, creamy sauce.
• A side of homemade cranberry sauce can introduce a delightful touch of sweetness and tartness, echoing the holiday flavors of the turkey.
• Other roasted vegetables like sweet, caramelized carrots or comforting sweet potatoes can add more depth and color to your plate.
• For another salad option, a creamy Caesar salad with crunchy croutons offers a different kind of texture and a zesty flavor profile that pairs well with rich casseroles.

More Hearty Casseroles to Enjoy

If you love the comforting appeal of Turkey Tetrazzini, you’ll surely enjoy these other hearty casserole recipes perfect for family dinners or entertaining:

• Sweet Potato Casserole Recipe with a brown sugar pecan topping – a perfect blend of sweet and savory.
• Twice-Baked Potato Casserole that’s pure comfort food, loaded with cheesy potato goodness.
• Chicken Noodle Casserole the whole family will love, a timeless classic.
• Chicken Poppy Seed Casserole made with rice and broccoli, a delicious and easy one-pan meal.
• Crockpot Cowboy Casserole that readers absolutely rave about for its ease and flavor.

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Turkey Tetrazzini

By
Chelsea Lords

Turn leftover turkey into a crowd-pleaser with this easy, cheesy Turkey Tetrazzini! A creamy pasta bake loaded with herbs, it’s perfect for post-holiday meals.

Prep Time:
30 minutes

Cook Time:
25 minutes

Total Time:
55 minutes

Servings:
6 servings

Video

A video demonstration of this recipe is available on the original blog post.

Equipment

• 9 x 13-inch ceramic baking pan
• Large pot

Ingredients

• 1 (16-ounce) box spaghetti, snapped in half
• 4 tablespoons unsalted butter
• 1 pound mushrooms, thinly sliced; Baby Bella mushrooms recommended
• 1-1/2 cups finely diced yellow onion (1 large)
• 1/4 cup all-purpose flour
• 3 cups half-and-half (see note 1)
• 2 cups reduced-sodium chicken broth
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon dried thyme
• 1 teaspoon dried parsley
• 1/2 teaspoon ground mustard (optional)
• Salt and pepper, to taste
• 2 cups freshly shredded sharp Cheddar cheese (7 ounces)
• 2 cups diced cooked turkey
• 1 cup frozen peas
• 3/4 cup panko breadcrumbs plus 2 tablespoons butter, for optional topping (see note 2)

Instructions

• Preheat oven to 325°F (160°C) and lightly grease a 9×13-inch ceramic pan; set aside. In a large pot, bring 12 cups water to a boil; add 1 tablespoon salt and the broken spaghetti. Cook for one minute less than the package instructs. Drain and cool, tossing occasionally to prevent sticking.
• In a large pot, melt the butter over high heat. Add mushrooms and cook (while stirring) 4 minutes until they start to soften.
• Add onion and continue cooking 3–5 minutes or until mushrooms are golden.
• Reduce heat to medium. Add flour and stir constantly for 1 minute. Gradually pour in 1-1/2 cups half-and-half, stirring until it thickens (about 30 seconds). Add chicken broth, remaining half-and-half, and all seasonings. Add salt/pepper to taste (start with 3/4 teaspoon salt and 1/2 teaspoon pepper). Keep cooking and stirring occasionally until the sauce thickens to the point where it leaves a trail on a spoon (see note 3).
• Turn off the stove. Mix in half the cheese until just combined. Add pasta, turkey, and peas, stirring until well coated. Taste and adjust seasonings if needed. Transfer to the prepared pan in an even layer. Top with remaining cheese and optional breadcrumb topping (see note 2). Bake 20–25 minutes or until cheese is bubbly and golden. Optionally garnish with fresh thyme and serve immediately.

Recipe Notes

Note 1: Half-and-half is a dairy product; use half whole milk and half heavy cream in a pinch if you don’t have it.

Note 2: Here’s how to make the optional panko topping: Melt 2 tablespoons butter in a large skillet over medium-high heat. Once melted, add panko breadcrumbs and salt to taste (a good starting point is 1/4 teaspoon). Stir constantly until lightly browned, then sprinkle over the casserole. If you prefer not to use the stovetop, just melt butter in the microwave and mix it thoroughly with the panko and salt.

Note 3: The sauce should be thick enough that when drawing a line on the back of a spoon, it leaves a visible mark. It does not need to be extremely thick at this stage, as it will thicken more after adding other ingredients and during baking. Constantly whisk and scrape the bottom to avoid flour settling or clumping.

Storage: Refrigerate cooled leftovers in an airtight container for up to 4 days, or freeze for up to 3 months. Thaw frozen Tetrazzini in the fridge overnight before reheating. Reheat covered in the oven at 350°F (175°C) for 15–20 minutes, or microwave individual portions until warm.

Nutrition Information (Approximate)

Serving: 1 serving |
Calories: 811kcal |
Carbohydrates: 77g |
Protein: 42g |
Fat: 38g |
Saturated Fat: 21g |
Polyunsaturated Fat: 3g |
Monounsaturated Fat: 10g |
Trans Fat: 0.3g |
Cholesterol: 142mg |
Sodium: 544mg |
Potassium: 978mg |
Fiber: 6g |
Sugar: 9g |
Vitamin A: 3264IU |
Vitamin C: 6mg |
Calcium: 471mg |
Iron: 11mg

Nutrition information is automatically calculated, so should only be used as an approximation.