How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Portobello Tetrazzini?

You need 10 ingredients. The key ingredients include: 4 ounces uncooked spaghetti, Cooking spray, 2 (6-ounce) packages sliced portobello mushrooms, coarsely chopped, 1 cup frozen vegetable seasoning blend, thawed and drained (such as McKenzie's), and more.

Is Portobello Tetrazzini suitable as pasta & noodles?

Yes, Portobello Tetrazzini falls under the Pasta & Noodles category and is a great choice for this type of meal.

How do I store leftover Portobello Tetrazzini?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Portobello Tetrazzini Recipe

Name: Portobello Tetrazzini
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 4 ounces uncooked spaghetti; Cooking spray; 2 (6-ounce) packages sliced portobello mushrooms, coarsely chopped; 1 cup frozen vegetable seasoning blend, thawed and drained (such as McKenzie's); 1 (10 3/4-ounce) can condensed reduced-fat, reduced-sodium cream of mushroom soup, undiluted; 1/2 cup fat-free milk; 3 tablespoons sherry; 1/2 teaspoon salt; 1/4 teaspoon freshly ground black pepper; 1/4 cup preshredded Parmesan cheese

Try this homemade Portobello Tetrazzini recipe the whole family will love. Made with spaghetti, Cooking spray, portobello mushrooms and condensed reduce…

This Portobello Tetrazzini relies on simple, everyday ingredients such as uncooked spaghetti, cooking spray, fat-free milk and sherry. It comes together quickly and makes 4 servings, at about 62 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Pasta & Noodles

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Coconut cream is a reliable plant-based alternative to dairy cream.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Portobello Tetrazzini

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions