Leftover Turkey Tetrazzini (Creamy Pasta Bake)

The day after a holiday feast, the refrigerator is packed with containers of turkey and the question is always the same: what do you do with all of it? Leftover turkey tetrazzini is one of the best answers there is. It takes shredded or diced turkey, folds it into a creamy mushroom-and-pea pasta sauce, and bakes the whole thing under a golden parmesan breadcrumb crust until it is bubbling and irresistible.

Tetrazzini has classic comfort-food roots — a baked pasta dish traditionally made with poultry or seafood in a sherry-laced cream sauce — and this version keeps all of that richness while being built squarely around leftovers. The sauce is a simple from-scratch blend of butter, flour, chicken or turkey broth, and cream, seasoned with garlic, thyme, and a splash of dry sherry or white wine. No canned soup required, and honestly, once you taste the homemade sauce you will never go back.

Everything comes together in one large skillet before it heads into the oven, so cleanup stays manageable. The pasta (spaghetti is traditional, though any short pasta works) soaks up the sauce in the best way during baking, the peas add little pops of sweetness and color, and the breadcrumb-parmesan topping turns crisp and golden in about 25 minutes. Serve it straight from the dish at the table and watch it disappear.

This is the kind of recipe that makes leftovers feel like the main event instead of a rerun. It also freezes well, reheats beautifully, and works just as well with leftover chicken or even deli turkey when there is no holiday bird in sight. If you are feeding a crowd after Thanksgiving or just want a cozy weeknight bake that stretches a few cups of cooked poultry into a full dinner, this tetrazzini belongs in your rotation.

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Ingredients

• 12 ounces spaghetti, broken in half (or linguine, fettuccine, or any short pasta)
• 4 tablespoons unsalted butter, divided
• 8 ounces mushrooms, sliced (cremini or white button)
• 1 small yellow onion, finely diced
• 3 cloves garlic, minced
• 1/4 cup all-purpose flour
• 2 cups chicken or turkey broth, warmed
• 1 1/2 cups heavy cream (or half-and-half for a lighter sauce)
• 1/4 cup dry sherry or dry white wine (optional, but recommended)
• 1 teaspoon dried thyme (or 1 tablespoon fresh thyme leaves)
• 1/2 teaspoon fine sea salt, plus more to taste
• 1/2 teaspoon black pepper
• 1/4 teaspoon freshly grated nutmeg (optional)
• 4 cups cooked turkey, shredded or cut into bite-size pieces
• 1 cup frozen peas, thawed
• 3/4 cup grated Parmesan cheese, divided
• 1 cup plain breadcrumbs (panko or regular)
• 2 tablespoons olive oil
• Fresh parsley, chopped, for garnish

Instructions

1. Heat the oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with butter or cooking spray.
2. Bring a large pot of salted water to a boil and cook the spaghetti until just shy of al dente — about 1 minute less than the package directions. The pasta will finish cooking in the oven. Drain and set aside.
3. In a large deep skillet or Dutch oven, melt 2 tablespoons of the butter over medium-high heat. Add the sliced mushrooms in a single layer and cook without stirring for 2 minutes, then stir and continue cooking until they are golden and their liquid has evaporated, 5–7 minutes total. Season with a pinch of salt.
4. Add the diced onion to the mushrooms and cook, stirring occasionally, until softened, about 4 minutes. Stir in the garlic and cook for 30 seconds more, until fragrant.
5. Reduce the heat to medium. Push the vegetables to the edges of the pan and melt the remaining 2 tablespoons of butter in the center. Sprinkle the flour over everything and stir constantly for 1–2 minutes to form a pale roux — this cooks out the raw flour taste.
6. Slowly pour in the warmed broth, whisking constantly to keep the sauce smooth. Let it come to a gentle simmer and thicken for 2–3 minutes.
7. Whisk in the cream, the sherry or wine (if using), thyme, salt, pepper, and nutmeg. Simmer gently for 2–3 minutes until the sauce coats the back of a spoon.
8. Stir in the cooked spaghetti, turkey, peas, and 1/2 cup of the Parmesan. Toss everything together until the pasta is evenly coated in sauce. Taste and adjust the salt and pepper.
9. Spread the mixture evenly into the prepared baking dish.
10. In a small bowl, toss the breadcrumbs with the olive oil and the remaining 1/4 cup of Parmesan until evenly coated. Sprinkle the crumb mixture in an even layer over the casserole.
11. Bake for 22–28 minutes, until the topping is deep golden brown and the edges are bubbling.
12. Let the tetrazzini rest for 10 minutes before serving — this lets the sauce set so each scoop holds together. Sprinkle with chopped fresh parsley and serve.

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Tips for the Creamiest Tetrazzini

• Undercook the pasta slightly. It absorbs sauce in the oven, so pulling it a minute early keeps it from turning mushy in the final bake.
• Warm the broth before adding it. Cold broth hitting a hot roux is the main cause of lumps. Warming it first keeps the sauce silky with almost no whisking effort.
• Brown the mushrooms properly. Let them sit undisturbed in the hot pan for a couple of minutes before stirring. That golden sear adds a deep, savory flavor that bland, steamed mushrooms never deliver.
• Use a full-flavored broth. Since the sauce is the soul of this dish, a good chicken or turkey broth makes a real difference. If you have homemade turkey stock from the holiday carcass, this is its moment to shine.
• Do not skip the resting time. Ten minutes on the counter lets the sauce thicken around the pasta so the casserole scoops cleanly instead of running across the plate.
• Sherry is worth it. The small splash of dry sherry is a classic tetrazzini move — it adds a subtle depth and warmth that rounds out the cream sauce. Dry white wine works the same way, and you can simply leave it out if you prefer.
• Season at the end. Cooked leftover turkey varies in saltiness depending on how it was prepared, so taste the finished mixture before baking and adjust the salt then.

Variations

• Chicken tetrazzini — swap the turkey for an equal amount of cooked chicken. Rotisserie chicken is a fantastic shortcut, and this is a great way to use up a leftover roast chicken from earlier in the week.
• Seafood tetrazzini — the classic original was actually made with chicken or turkey, but shrimp or crab make a lovely upscale version. Use cooked, chopped shrimp and reduce the thyme slightly so the seafood shines.
• Veggie-packed — add a cup of sautéed diced bell peppers, steamed broccoli florets, or sliced carrots along with the peas. A handful of baby spinach stirred into the hot sauce wilts down perfectly too.
• Lighter version — use half-and-half instead of heavy cream, 2% milk for part of the broth, and cut the breadcrumb topping in half. The sauce will be a little less rich but still comforting.
• Gluten-free — use your favorite gluten-free spaghetti and swap the all-purpose flour for a 1:1 gluten-free flour blend. Use gluten-free breadcrumbs or crushed gluten-free crackers for the topping.
• Cheese swaps — Gruyère or fontina melted into the sauce adds wonderful depth. A little shredded mozzarella on top of the breadcrumbs gives extra cheesy pull.
• Spicy kick — stir 1/2 teaspoon of red pepper flakes into the sauce with the thyme, or add a dash of hot sauce to taste.
• Smoky twist — a teaspoon of smoked paprika in the sauce pairs beautifully with turkey and gives the whole dish a warm, rustic flavor.

Storage and Reheating

Store leftover tetrazzini covered in the refrigerator for up to 4 days. Reheat individual portions in the microwave with a splash of milk or broth stirred in to loosen the sauce, or warm the whole dish covered with foil in a 350°F (175°C) oven for 20–25 minutes until heated through. If the topping has softened, remove the foil for the last 5 minutes to re-crisp it.

To freeze, assemble the casserole completely (before baking), wrap tightly in plastic wrap and then foil, and freeze for up to 3 months. Bake from frozen at 375°F (190°C) for 50–60 minutes, covered with foil for the first 35 minutes, then uncovered to brown the top. You can also freeze baked leftovers in individual portions — they make excellent ready-made lunches. Thaw overnight in the refrigerator and reheat as above.

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Nutrition

Estimated per serving (recipe makes 8 servings): approximately 620 calories, 34 g protein, 52 g carbohydrates, 30 g fat, 3 g fiber, 6 g sugar, 480 mg sodium. Values are estimates and will vary based on the specific ingredients used, the leanness of your turkey, and portion size. Nutrition information is provided as a general guide and is not a substitute for professional dietary advice.