Turkey Tetrazzini turns leftover roast turkey into a creamy, cozy pasta bake. Long spaghetti strands hold a homemade mushroom sauce, while melted cheese and buttery crumbs give the top a golden finish. This version skips canned soup and uses simple ingredients. Add a green salad, and dinner is ready to share.
Why I Love This Recipe
A good leftover dinner should feel like a meal of its own. Here, the turkey stays tucked in a creamy sauce while mushrooms bring savory flavor to every forkful. The crisp topping gives the soft pasta just the right contrast.
- Useful leftovers: Cooked turkey gets a fresh purpose without another long roast.
- Homemade sauce: Milk, cream and broth make a smooth sauce with no canned soup.
- Easy to share: A roomy baking dish makes eight satisfying portions.
- Great texture: Tender pasta, juicy turkey and golden crumbs keep each bite interesting.
What You’ll Need
- Servings: 8
- Prep Time: 20 minutes
- Cook Time: 50 minutes, with the pasta and sauce cooked at the same time
- Rest Time: 5 minutes
- Total Time: 1 hour 15 minutes
- Oven Temperature: 375°F (190°C)
- Baking Dish: 9×13-inch baking dish, about 3 quarts
- 12 ounces dry spaghetti
- 3 cups cooked turkey, cut into bite-size cubes (about 12 ounces); remove skin and bones
- 12 ounces cremini mushrooms, sliced
- 1 medium onion, finely diced
- 3 garlic cloves, minced
- 6 tablespoons unsalted butter, divided, plus 1 teaspoon for greasing
- 1/3 cup all-purpose flour
- 1 cup low-sodium chicken broth
- 2 cups whole milk
- 1 cup heavy cream
- 3/4 teaspoon fine salt, divided
- 1/2 teaspoon ground pepper
- 1/2 teaspoon dried thyme
- 1 1/2 cups shredded low-moisture mozzarella (6 ounces)
- 1/2 cup finely grated Parmesan (about 2 ounces), divided
- 1/2 cup plain panko breadcrumbs
- 2 tablespoons finely chopped fresh parsley
Tools You Need
- 9×13-inch ceramic baking dish with a white interior and dark green exterior
- Large pasta pot and colander
- Deep 12-inch skillet
- Large glass mixing bowl and small glass bowl
- Whisk, measuring cups and measuring spoons
- Serving spoon and instant-read thermometer
How to Make Turkey Tetrazzini
Cook the pasta while you build the sauce, then bring everything together for the oven.
Step 1: Get Ready and Cook the Spaghetti
Heat the oven to 375°F (190°C).
Grease your 9×13-inch baking dish with 1 teaspoon unsalted butter.
Bring a large pot of water to a boil and add 12 ounces dry spaghetti. Cook for 2 minutes less than the package’s al dente time, usually about 7–9 minutes, so the center still has a firm bite.
Drain well. Do not rinse; the surface starch helps the sauce cling.
Step 2: Soften the Vegetables
Melt 3 tablespoons unsalted butter in a deep 12-inch skillet over medium-high heat.
Add 12 ounces sliced cremini mushrooms, 1 medium finely diced onion and 1/4 teaspoon fine salt. Cook for 8–10 minutes, stirring now and then, until the onion is soft and most of the mushroom liquid has cooked away.
Stir in 3 minced garlic cloves and cook for 30 seconds. Lower the heat to medium.
Step 3: Make the Cream Sauce
Add 2 tablespoons unsalted butter to the vegetables. Once melted, stir in 1/3 cup all-purpose flour and cook for 1 minute, stirring until no dry flour remains.
Slowly whisk in 1 cup low-sodium chicken broth, followed by 2 cups whole milk and 1 cup heavy cream. Scrape the bottom and corners so the flour blends into the liquid.
Add the remaining 1/2 teaspoon fine salt, 1/2 teaspoon ground pepper and 1/2 teaspoon dried thyme. Simmer gently for 4–6 minutes, stirring often, until the sauce coats the back of a spoon but still flows easily.
Take the skillet off the heat and stir in 1/4 cup finely grated Parmesan until melted. The sauce should be creamy and pourable, rather than stiff like paste.
Step 4: Combine the Filling
Put the drained spaghetti from 12 ounces dry pasta and 3 cups bite-size cooked turkey cubes into a large glass mixing bowl.
Add all the mushroom cream sauce and toss gently until every strand is coated. Spread the mixture evenly in the prepared 9×13-inch baking dish. It should look a little looser than the finished bake because the pasta will absorb sauce.
Step 5: Add the Topping
Scatter 1 1/2 cups shredded mozzarella and the remaining 1/4 cup finely grated Parmesan evenly over the filling in a thin layer reaching nearly to the edges.
Melt the remaining 1 tablespoon unsalted butter and mix it with 1/2 cup plain panko breadcrumbs in a small bowl.
Scatter the buttered crumbs over the cheese. Leave some cheese visible between the crumbs so it can melt into a golden top.
Step 6: Bake and Add Parsley
Bake uncovered for 25–30 minutes, until the crumbs are golden and the center reaches 165°F (74°C) on an instant-read thermometer. Check the center, not just the edges.
If the top browns too fast, loosely cover it with foil for the rest of the bake.
As soon as the dish comes out, scatter 2 tablespoons finely chopped fresh parsley over the melted cheese and crumbs.
Let it rest for 5 minutes so the sauce settles without drying out.
Step 7: Scoop and Serve
Divide into 8 portions, scooping through the topping to catch the turkey, mushrooms and spaghetti below. Keep the soft, creamy mound loose rather than trying to cut neat squares.
Serve with an optional crisp green salad or roasted green beans for a lighter contrast to the rich sauce.
Why This Recipe Works (Quick Science)
Butter and flour form a roux. As the milk and broth heat, starch in the flour swells and thickens the liquid. Cream adds richness, while Parmesan gives the sauce a savory finish.
Slightly undercooked spaghetti takes up some sauce in the oven without turning soft. Cooking the mushrooms first removes extra water, which helps keep the casserole creamy. A short rest lets the sauce settle around the pasta, while the buttered crumbs stay crisp on top.
Common Mistakes to Avoid
- Boiling the pasta until fully soft: It still has oven time ahead. Stop while the middle is firm.
- Leaving mushroom water in the skillet: Cook away most of it before adding flour.
- Pouring all the liquid into the flour at once: Add it slowly and whisk to prevent lumps.
- Baking until the sauce looks dry: Check the center temperature and stop once it reaches 165°F (74°C).
- Using cold turkey without checking the middle: A golden topping does not prove the filling is heated through.
What to Serve With Turkey Tetrazzini
A crisp green salad with a tangy dressing balances the creamy pasta. Roasted green beans or steamed broccoli also work well. These are optional sides; the casserole already brings turkey, pasta and mushrooms to the table.
Substitutions and Variations
- Cooked chicken: Swap it for the turkey in the same amount.
- Mushrooms: White button mushrooms work in place of cremini.
- Different pasta: Thin linguine works, but use its package timing as your guide.
- Smaller batch: Halve every ingredient and use an 8×8-inch dish. Start checking the center after 20 minutes.
Make-Ahead Tips
Prepare the filling and spread it in the dish. Cool promptly, cover and refrigerate for up to 24 hours. Keep the cheese and buttered crumbs separate, then add them just before baking. A cold filling may need another 10–15 minutes in the oven; check for 165°F (74°C) in the center. Follow your bakeware maker’s guidance about temperature changes.
Leftovers and Storage
Refrigerate in shallow covered containers within 2 hours. Keep at 40°F (4°C) or colder and use within 3–4 days of the turkey’s original cooking date. Turning older turkey into a casserole does not restart its storage time.
Reheat portions, covered, to 165°F (74°C) throughout. A small splash of milk helps loosen the sauce. Freeze promptly in airtight portions for up to 2 months for best quality; thaw overnight in the refrigerator. The sauce may separate slightly, and the topping will soften.
Macros Information
Estimated per serving, based on 8 servings and excluding optional sides:
- Calories: 535
- Protein: 29 g
- Carbohydrates: 44 g
- Fat: 27 g
- Saturated Fat: 16 g
- Fiber: 2 g
- Sugar: 6 g
- Sodium: 610 mg
These values are estimates and vary with the turkey, broth and cheese you use.
Frequently Asked Questions (FAQ)
Q: Can I use turkey breast and dark meat together?
A: Yes. A mix works well. Remove skin, bones and any tough bits before cutting the meat into bite-size cubes.
Q: Does the turkey go in raw?
A: No. This recipe uses fully cooked turkey. The oven heats the assembled casserole through rather than cooking raw turkey.
Q: Can I use a different pasta shape?
A: Yes, though long spaghetti gives the dish its familiar texture. Use the same dry weight and slightly undercook any substitute.
Q: Why is my sauce too thick before baking?
A: It may have simmered too long. Stir in a little milk until it flows easily around the pasta. It should not look like a stiff paste.
Q: Can I leave out the breadcrumbs?
A: Yes. Skip the panko and its tablespoon of butter. The cheese will still make a tasty top, but you will lose the crisp crumb finish.
Q: Can I use turkey gravy instead of broth?
A: Broth is the better choice here. Gravy already contains thickeners and seasoning, so it can make this sauce too thick or salty.
Q: Can I assemble it the night before?
A: Yes, as long as the cooked turkey is still within its safe storage window. Chill the filling promptly and keep the topping separate until baking.
Q: How do I keep the turkey from drying out?
A: Keep it surrounded by sauce and avoid baking longer than needed. Check for 165°F (74°C) in the center and rest briefly before serving.
Final Thoughts
Turkey Tetrazzini makes a generous dinner from a few cups of leftover turkey. The creamy mushroom sauce and crisp golden topping give it plenty of comfort and flavor. Leave a comment with your favorite way to use leftover roast turkey. Happy cooking!