Chicken Tetrazzini Recipe tastes like ultra-creamy, cheesy comfort with tender chicken, buttery mushrooms, and pasta all tucked under a golden crust, and it works perfectly for busy families or anyone who wants a cozy casserole in about 1 hour total. This Chicken Tetrazzini Recipe suits weeknights, potlucks, or make-ahead freezer meals when you need dinner to feel like a warm hug. I grew up eating every version of chicken pasta under the sun, and this one still disappears first at my table.

Why Chicken Tetrazzini Recipe Is Worth It

This Chicken Tetrazzini Recipe gives you all the comfort of a creamy pasta bake with very little fuss. You use cooked chicken, pantry pasta, and a simple homemade sauce that tastes like you spent all afternoon on it.

The casserole feeds a crowd, reheats well, and works great for meal prep. Kids usually love it, adults go back for seconds, and the leftovers taste even better the next day.

“This Chicken Tetrazzini Recipe tastes like a cozy restaurant casserole but comes together in my tiny kitchen on a weeknight. ★★★★★”

Ingredients You Need

Main ingredients

12 ounces spaghetti or linguine
- Use regular, whole wheat, or gluten free pasta as needed.
3 cups cooked chicken, shredded or diced
- Rotisserie chicken saves time and adds flavor.
8 ounces sliced mushrooms
- Cremini or baby bella mushrooms give deeper flavor than plain white.
1 small onion, finely chopped
3 cloves garlic, minced
3 tablespoons unsalted butter
3 tablespoons all purpose flour
2 cups chicken broth
- Use low sodium broth so you control the salt.
1 cup whole milk
1 cup heavy cream
- You can swap half and half if you want a slightly lighter sauce.
1 cup shredded mozzarella cheese
1 cup grated Parmesan cheese, divided
- Use real Parmesan, not the green can, for best flavor.
1 cup frozen peas, thawed and drained
2 tablespoons olive oil
1 teaspoon kosher salt, plus more to taste
½ teaspoon black pepper
½ teaspoon garlic powder
½ teaspoon onion powder
½ teaspoon dried thyme or Italian seasoning
2 tablespoons chopped fresh parsley, plus extra for garnish

Topping

1 cup panko breadcrumbs
- Regular or gluten free both work.
2 tablespoons melted butter
¼ cup grated Parmesan cheese
Pinch of salt and pepper

Pantry shortcuts and notes

Use canned mushrooms if you do not have fresh ones; drain them well.
Use condensed cream of mushroom soup in a pinch and thin it with broth, though the homemade sauce tastes richer.
Use pre-shredded cheese if you need speed, but freshly grated cheese melts smoother.

Equipment list

Large pot for boiling pasta
Large skillet or sauté pan
Medium saucepan (if you prefer to make the sauce separate from the vegetables)
9×13 inch baking dish
Mixing bowls
Whisk
Wooden spoon or spatula
Colander

Quick Tips & substitutions

Salt the pasta water generously so the noodles carry flavor into the casserole.
Cook the pasta to just shy of al dente, since it will finish in the oven.
Use rotisserie chicken or leftover grilled chicken to save time.
Swap peas for frozen mixed vegetables if your family prefers more variety.
Use cream cheese in place of part of the heavy cream for an extra thick, tangy sauce.
Use gluten free pasta and gluten free panko to make the recipe gluten friendly.
Skip mushrooms if someone dislikes them and add extra peas or steamed broccoli.
Use all milk and skip cream for a lighter sauce, then add a bit more cheese for richness.
Season the sauce generously; bland sauce leads to bland Chicken Tetrazzini Recipe.
Let the casserole rest 10 minutes before serving so it sets and slices cleanly.

How to Make Chicken Tetrazzini Recipe

Step 1: Cook the pasta

Bring a large pot of salted water to a boil.
Add the spaghetti or linguine and cook until just shy of al dente, usually 1 to 2 minutes less than the package suggests.
Drain the pasta, toss it with a drizzle of olive oil to prevent sticking, and set it aside.

Step 2: Sauté the vegetables

Heat 2 tablespoons olive oil and 1 tablespoon butter in a large skillet over medium heat.
Add the chopped onion and cook until it softens and turns translucent, about 4 to 5 minutes.
Add the sliced mushrooms and cook until they release their moisture and turn golden in spots, about 6 to 8 minutes.
Stir in the minced garlic and cook 30 seconds until fragrant, then turn off the heat.

Step 3: Make the creamy sauce

In a medium saucepan, melt the remaining 2 tablespoons butter over medium heat.
Whisk in the flour and cook 1 to 2 minutes, whisking constantly, until the mixture turns slightly golden and smells nutty.
Slowly pour in the chicken broth while you whisk, then add the milk and heavy cream.
Keep whisking until the sauce thickens enough to coat the back of a spoon, about 5 to 7 minutes.
Stir in salt, pepper, garlic powder, onion powder, and dried thyme or Italian seasoning.
Add ½ cup Parmesan and ½ cup mozzarella, then whisk until the cheese melts and the sauce turns smooth and creamy.
Taste and adjust seasoning so the sauce tastes slightly more seasoned than you think you need.

Step 4: Combine pasta, chicken, and sauce

Preheat your oven to 375°F.
In a large mixing bowl, add the cooked pasta, shredded chicken, sautéed mushrooms and onions, and thawed peas.
Pour the creamy sauce over the mixture.
Toss gently until everything gets evenly coated and the chicken and vegetables distribute through the pasta.

Step 5: Assemble in the baking dish

Lightly grease a 9×13 inch baking dish with butter or cooking spray.
Transfer the pasta mixture into the dish and spread it into an even layer.
Sprinkle the remaining ½ cup mozzarella and ¼ cup Parmesan evenly over the top.

Step 6: Add the crunchy topping

In a small bowl, mix the panko breadcrumbs, melted butter, ¼ cup Parmesan, and a pinch of salt and pepper.
Stir until the breadcrumbs soak up the butter and clump slightly.
Sprinkle the breadcrumb mixture evenly over the cheesy pasta.

Step 7: Bake

Place the baking dish on the center rack of the preheated oven.
Bake 25 to 30 minutes, until the sauce bubbles around the edges and the top turns golden brown.
If the top browns too quickly, tent the dish loosely with foil for the last 5 to 10 minutes.

Step 8: Rest and serve

Remove the Chicken Tetrazzini Recipe from the oven and let it rest 10 minutes.
Sprinkle chopped fresh parsley over the top for color and freshness.
Scoop generous portions and serve hot while the cheese still stretches.

Recipe Variations

Gluten free: Use gluten free pasta, gluten free panko, and swap the flour for a gluten free all purpose blend.
Lighter version: Use all milk instead of cream, skip some cheese, and add extra vegetables like broccoli or spinach.
Low carb: Swap pasta for steamed spaghetti squash strands or lightly cooked zucchini noodles and reduce the sauce slightly.
Extra protein: Add cooked turkey, leftover roast chicken, or even cooked white beans along with the chicken.
Veggie heavy: Add sautéed bell peppers, spinach, or chopped broccoli florets to the mushroom and onion mix.
Spicy: Add red pepper flakes to the sauce or stir in a spoonful of your favorite hot sauce.
Dairy free: Use olive oil instead of butter, plant based milk and cream, and dairy free cheese shreds.

Ways to Serve

Serve Chicken Tetrazzini Recipe with a crisp green salad and simple vinaigrette.
Add garlic bread or toasted baguette slices on the side.
Pair with roasted vegetables like carrots, green beans, or Brussels sprouts.
Offer a simple fruit salad for a fresh, sweet finish.
Pack leftovers in lunch containers with a side of raw veggies and hummus.

Storage Success

Let the Chicken Tetrazzini Recipe cool to room temperature, then cover the dish tightly or portion it into airtight containers. Store in the refrigerator for up to 3 to 4 days and reheat in the oven at 350°F until hot, or use the microwave in short bursts with a splash of milk to keep it creamy. Freeze the casserole unbaked or baked for up to 2 months; wrap it well in foil and plastic to prevent freezer burn. Thaw overnight in the fridge, then bake until the center steams and the top turns crisp again.