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 Spinach And Mushroom Alfredo Sauce?

You need 11 ingredients. The key ingredients include: 8 tablespoons unsalted butter, 1 lb button mushroom, thinly sliced, 1 cup yellow onion, finely chopped, 3 tablespoons garlic, minced, and more.

Is Spinach And Mushroom Alfredo Sauce suitable as vegetarian?

Yes, Spinach And Mushroom Alfredo Sauce falls under the Vegetarian category and is a great choice for this type of meal.

How do I store leftover Spinach And Mushroom Alfredo Sauce?

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

Spinach And Mushroom Alfredo Sauce Recipe

Name: Spinach And Mushroom Alfredo Sauce
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 8 tablespoons unsalted butter; 1 lb button mushroom, thinly sliced; 1 cup yellow onion, finely chopped; 3 tablespoons garlic, minced; 1/2 cup flour; 7 cups milk; 2 teaspoons kosher salt; 1/2 teaspoon black pepper, freshly ground; 1/4 teaspoon nutmeg, freshly grated; 1 lb spinach, stemmed washed blanched and roughly chopped; 3 cups grated parmesan cheese

Try this homemade Spinach And Mushroom Alfredo Sauce recipe the whole family will love. Made with unsalted butter, button mushroom, yellow onion and gar…

This Spinach And Mushroom Alfredo Sauce relies on simple, everyday ingredients such as unsalted butter, yellow onion, finely chopped, garlic, minced and flour. It comes together quickly and makes 4 servings, at about 932 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 Vegetarian

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

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
A good 1:1 gluten-free flour blend works well if you need a gluten-free version.

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

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Spinach And Mushroom Alfredo Sauce

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions