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Brown bowl of fettuccini pasta with butternut squash sauce on top.

Creamy Butternut Squash Sauce with Fettuccini

This Creamy Butternut Squash Sauce is a delicious vegetarian sauce that's incredibly easy to make. Simply roast vegetables and blend it all together! You can make it ahead or eat right away, but either way it's a great use of sweet squash.
4.67 from 3 votes
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Prep Time: 15 minutes
Cook Time: 50 minutes
Total Time: 1 hour 5 minutes
Servings: 4 servings

Ingredients

  • 1 lb pasta
  • 1 medium butternut squash 1 lb cubed squash
  • 1 small yellow onion
  • 4 cloves garlic
  • 2 tablespoon olive oil
  • 1 teaspoon Salt
  • ½ teaspoon pepper
  • 1 ½ cups vegetable broth
  • 1 cup heavy cream
  • ½ teaspoon nutmeg
  • ½ teaspoon cinnamon
  • ¼ cup parmesan cheese
  • ¼ cup pasta water
  • 1 tablespoon fresh thyme

Instructions

  • Preeat oven to 425℉
  • Cut the butternut squash into 1 inch cubes and roughly chop the onion. Toss with the garlic cloves, olive oil, salt, pepper, nutmeg, and cinnamon.
  • Roast for 40-45 minutes until the squash is tender.
  • Blend together the roasted vegetables (everything you baked - squash, onion, garlic), vegetable broth, and cream until smooth.
    Important: let the roasted vegetables cool completely.
    Note: If you don't wait until the vegetables are completely cool, only blend them with the vegetable broth. Add the cream later when you are warming up the sauce on the stovetop.
  • Cook your favorite pasta in salted boiling water to al-dente. Reserve ½ cup of pasta water.
  • In the meantime, in a large pot warm your sauce over medium heat on the stovetop and mix in the grated parmesan cheese
    Note: now is the time to add the cream if you did not add it before.
  • Add the pasta along with ¼ cup pasta water to the pot with the sauce and mix to combine. Add more pasta water as needed to thin the sauce.
  • Serve with fresh thyme and more parmesan cheese.

Nutrition Estimate

Calories: 821kcal | Carbohydrates: 114g | Protein: 21g | Fat: 33g | Saturated Fat: 16g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 12g | Cholesterol: 86mg | Sodium: 1074mg | Potassium: 1032mg | Fiber: 8g | Sugar: 9g | Vitamin A: 21129IU | Vitamin C: 46mg | Calcium: 250mg | Iron: 3mg
Course: Dinner
Cuisine: American
Keyword: Pasta, Squash
Author: Haley