Grandma’s Restaurant Chicken Tetrazzini Recipe: Nostalgic Creamy Pasta with Mushrooms

This chicken tetrazzini brings old-world comfort to your table with a creamy sauce that clings to every noodle.

I developed this version after testing countless recipes to capture that nostalgic restaurant quality. The secret is in the roux-based sauce and properly cooked chicken that stays tender, not rubbery.

What you get is a dish with al dente pasta, juicy chicken, and earthy mushrooms all coated in a velvety parmesan sauce. It’s the kind of meal that feels like a warm hug on a cold evening.

Bake until golden and bubbling for that perfect finishing touch. Here’s how to make this classic at home.

Ingredients for Grandma’s Restaurant Chicken Tetrazzini

Classic comfort in a baking dish with tender chicken, mushrooms, and that signature creamy sauce.

The chicken needs to stay juicy, so poach it in the broth you’ll use for the sauce—adds flavor and keeps it moist. I grab boneless, skinless breasts from Whole Foods or Costco when they’re on sale. For the Parmesan, skip the pre-grated stuff—a wedge from the deli counter melts better and tastes fresher. The mushrooms should be fresh (not canned) for that earthy bite.

No dry sherry? A splash of white wine works, or skip it entirely. Short on heavy cream? Half-and-half plus a pat of butter gets close. If you’re avoiding dairy, coconut milk plus nutritional yeast mimics the creaminess. The noodles can be any long pasta—linguine or fettuccine both work great. For extra richness, swap half the milk for cream (worth the splurge).

Assemble it ahead and refrigerate overnight—the flavors deepen. Baked tetrazzini keeps 3-4 days in the fridge, or freeze for 2-3 months. Reheat covered with foil to prevent drying (add a splash of milk if needed).

Step-by-Step Instructions for Creamy Chicken Tetrazzini

Here’s the method I’ve used for years—it delivers that nostalgic, velvety texture every time.

Step 1: Cook the Spaghetti and Shred the Chicken

Bring a large pot of salted water to a boil. Add the 12 oz Spaghetti Noodles and cook for 2 minutes less than package instructions—you want them slightly underdone. They’ll finish cooking in the sauce later. Drain and set aside.

While the pasta cooks, shred the 1.5 lb Chicken Breast into bite-sized pieces. I like to pull it apart with two forks for nice, uneven shreds that hold the sauce well. Set the chicken aside with the pasta until ready to use.

Step 2: Sauté Vegetables and Make the Roux

In a large Dutch oven or heavy pot, melt the 0.5 cup Unsalted Butter over medium heat. Add the 1 whole Onion, finely diced, and cook for 3-4 minutes until soft and translucent. Stir in the 8 oz Fresh Mushrooms and cook for another 5 minutes until they release their moisture and turn golden brown.

Add the minced 3 cloves Garlic Cloves and cook for 30 seconds until fragrant. Sprinkle the 0.5 cup All-Purpose Flour over the mixture and stir constantly for 1-2 minutes to cook out the raw flour taste. This forms your roux, which will thicken the sauce beautifully.

Step 3: Build the Creamy Sauce

Slowly pour in the 2 cups Chicken Broth and 2 cups Whole Milk, whisking constantly to prevent lumps. Bring the mixture to a simmer, then reduce heat to medium-low. Stir in the 0.5 cup Heavy Cream, 1 cup Parmesan Cheese, 1 tsp Salt, and 0.5 tsp Black Pepper.

Let the sauce simmer for 3-4 minutes, stirring occasionally, until it thickens enough to coat the back of a spoon. For extra depth, stir in the 2 tbsp Dry Sherry at this point. The sauce should look rich and velvety—this is where that nostalgic creaminess comes from.

Step 4: Combine Everything and Top with Breadcrumbs

Add the cooked spaghetti and shredded chicken to the sauce. Stir gently to combine, making sure every strand of pasta and piece of chicken is well coated. Transfer the mixture to a greased 9×13-inch baking dish.

Sprinkle the 0.5 cup Breadcrumbs evenly over the top. These will toast up nicely in the oven, adding a subtle crunch to contrast the creamy pasta below. The dish is now ready for its final bake to meld all the flavors together.

Step 5: Bake Until Bubbly and Golden

Bake in a preheated 375°F oven for 20-25 minutes, or until the top is golden brown and the edges are bubbling. You’ll know it’s done when the breadcrumbs are toasted and the sauce is gently bubbling around the edges.

Let it rest for 5 minutes before serving. This gives the sauce a chance to set slightly, making it easier to serve neat portions. The result should be creamy, comforting, and full of that nostalgic flavor you remember from Grandma’s kitchen.

Pro Cooking Tips for This Recipe

Roux Perfection

Cook your roux over medium heat for exactly 1-2 minutes after adding flour to eliminate the raw taste. Use a light-colored roux—this isn’t gumbo. I stir constantly with a wooden spoon to prevent scorching.

Sauce Consistency

Your sauce should coat the back of a spoon before adding pasta. If it’s too thick, whisk in ¼ cup milk at a time. Too thin? Let it simmer 1-2 minutes longer before combining with noodles. 💡

Pasta Secret

Undercook your 12 oz spaghetti by 2 minutes—it’ll finish perfectly in the sauce. Break noodles into 2-inch pieces so they’re easier to eat in every bite.

Chicken Prep

Poach your 1.5 lb chicken breast in the chicken broth you’ll use for the sauce. This adds flavor and keeps the meat juicy. Shred while warm using two forks for the best texture.

Baking Finish

Bake at 375°F until golden brown and bubbly, about 20-25 minutes. For extra crunch, broil for 1-2 minutes at the end, watching closely to avoid burning.

Resting Time

Let it rest 5 minutes after baking. This allows the sauce to set slightly, making serving easier and preventing a runny first scoop. 🔥

Frequently Asked Questions