Chicken Tetrazzini Original Recipe: Classic Creamy Pasta with Mushrooms

There’s a reason this classic chicken tetrazzini has stood the test of time—its creamy sauce and tender pasta create a dish that comforts like no other.

I’ve refined this recipe to stay true to its original roots while ensuring a foolproof method. The mushrooms add earthy depth, while the sherry brings a subtle complexity that elevates every bite.

What you’ll get is a classic casserole with a rich, velvety sauce clinging to each strand of pasta and every piece of chicken. It bakes to golden perfection with a crispy breadcrumb topping.

Perfect for family dinners or potlucks, this dish delivers timeless flavor in every serving.

Ingredients for Chicken Tetrazzini Original

A classic casserole built on creamy sauce, tender chicken, and earthy mushrooms for timeless comfort.

The mushrooms are non-negotiable here—cremini or baby bella deliver the meaty depth this dish demands. For the sherry, Harvey’s Bristol Cream is the gold standard (found at most liquor stores), but any dry sherry works. The Parmesan must be Parmigiano-Reggiano—pre-grated lacks the melt and complexity. Most supermarkets now carry Parmigiano wedges in the specialty cheese section, already aged to perfection.

No sherry on hand? Dry vermouth or white wine at a 1:1 ratio works well. For a non-alcoholic substitute, chicken broth with 1 tsp white wine vinegar mimics the tang. The pasta can be linguine or fettuccine if you prefer wider noodles. Want extra richness? Swap half the milk for half-and-half. The butter in the topping can be replaced with olive oil in a pinch.

This bakes and freezes beautifully. Cool completely, then refrigerate for up to 3 days or freeze for 3 months. For best results, thaw overnight before reheating. The breadcrumb topping stays crisp if you sprinkle it on just before baking.

Step-by-Step Instructions for Chicken Tetrazzini

Master this classic technique for a velvety sauce and perfectly balanced flavors every time.

Step 1: Prepare the Velouté Base

In a large Dutch oven or heavy pot, melt 0.5 cup unsalted butter over medium heat. Add the 1 whole shallot and cook for 2-3 minutes until translucent and fragrant, stirring frequently to prevent browning.

Whisk in the 0.5 cup all-purpose flour to create a smooth roux. Continue cooking for 1-2 minutes until the mixture turns a pale golden color and has a faint nutty aroma. This step cooks out the raw flour taste and builds the foundation for your sauce.

Gradually pour in the 2 cups whole milk and 2 cups chicken broth, whisking constantly to prevent lumps. The mixture will thicken as it comes to a simmer. I maintain a steady whisking motion until it’s completely smooth.

Step 2: Build the Creamy Sauce and Add Chicken

Once the velouté reaches a gentle simmer, reduce heat to medium-low and add the 1 lb cremini mushrooms. Cook for 5 minutes until the mushrooms release their moisture and it evaporates, leaving them tender and lightly golden.

Stir in the 3 cloves garlic cloves, 1 tbsp dijon mustard, 1.5 tsp kosher salt, and 0.5 tsp freshly ground black pepper. Add the 0.25 cup dry sherry and simmer for 2 minutes to cook off the alcohol.

Remove from heat and stir in the 1 cup heavy cream and 1 cup parmesan cheese until the cheese melts completely. Fold in the 2 lb chicken breast until fully coated in the sauce. The mixture should be thick and creamy at this stage.

Step 3: Incorporate the Pasta

Add the 12 oz spaghetti to the sauce, breaking it into 2-inch pieces as specified. Fold everything together gently but thoroughly, ensuring the pasta is completely coated. If the mixture seems too thick, add a splash of warm chicken broth to loosen it to your desired consistency.

The pasta will absorb some of the sauce as it sits, so aim for a slightly looser consistency than your final preference. I check that every strand is glistening with sauce and that the chicken is evenly distributed throughout.

Step 4: Add the Crispy Topping and Bake

Transfer the mixture to a greased 9×13-inch baking dish. In a small bowl, melt the remaining unsalted butter and toss it with the 0.75 cup panko breadcrumbs until evenly coated. Sprinkle this mixture evenly over the top of the casserole.

Bake at 375°F for 20-25 minutes until the topping is golden brown and the edges are bubbling. The breadcrumbs should be crisp and the sauce should be just starting to peek through in spots.

Let it rest for 5 minutes before serving. This allows the sauce to set slightly and makes for cleaner portions. The topping will maintain its crispness while the interior becomes creamy and cohesive.

Dietary Considerations for This Recipe

Gluten-Free Adaptation

For a gluten-free version, swap the 12 oz spaghetti for gluten-free pasta like Barilla red lentil or Jovial brown rice. Use 1:1 gluten-free flour blend for the roux—I recommend King Arthur Measure for Measure for best results. The texture remains nearly identical. 💪

Dairy-Free Option

Replace whole milk with unsweetened almond milk and heavy cream with full-fat coconut milk. Use vegan butter like Miyoko’s and nutritional yeast instead of Parmesan cheese. The sauce will be slightly thinner but still rich.

Lower-Carb Version

Use zucchini noodles or spaghetti squash in place of pasta. Reduce the all-purpose flour to ¼ cup and thicken the sauce with xanthan gum (½ tsp). This cuts carbs significantly while keeping the creamy texture.

Nut Allergy Note

This recipe is naturally nut-free, but always check your chicken broth and Parmesan cheese labels. Some brands process these in facilities with nuts. For extra safety, use certified nut-free ingredients like Kraft Parmesan. 📅

Lactose Intolerance

Substitute lactose-free milk and cream for their traditional counterparts. Use aged Parmesan like Parmigiano-Reggiano, which is naturally lower in lactose. The flavor remains authentic with minimal digestive discomfort.

Vegetarian Twist

Replace the 2 lb chicken breast with 1 lb sautéed mushrooms plus 1 can white beans. Use vegetable broth instead of chicken broth. The dish maintains its hearty, creamy character without meat.

Frequently Asked Questions