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Butternut Squash Alfredo Sauce

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Creamy butternut squash alfredo sauce has all of the cheesy richness you would expect in a good Alfredo with a lighter twist. The butternut squash brings great color and a little bit of a sweet and earthy undertone that makes it extra delicious.

Fork filled with butternut squash alfredo sauce coated pasta ready to eat.

Give traditional fettuccine alfredo and autumnal twist with the addition of butternut squash. Serve it as en entree or as a side dish for almost any main dish.

After seeing recipes like pumpkin macaroni and cheese and acorn squash mac and cheese, I am sure you know that we love the combination of squash, pasta and cheese. So seeing butternut squash in alfredo sauce shouldn’t be a huge surprise.

We always stock up on local winter squash before the farm stands close. So then we are on a mission for to work a little bit into every dish for a few months.

Looking down on a serving of creamy butternut squash alfredo pasta.

Our favorite alfredo sauce recipe was my birthday request for probably a solid decade. So you know it is sacred around here.

So messing with such a good thing is a hard sell at our table. But we have so much butternut squash, we had to give it a go.

The sauce is still every bit as smooth and creamy as you would want it to be. Plus it coats the pasta nicely, it is a fabulous alternative!

Why add butternut squash?

Well first, because we have a ton of it and it tastes good. But also it is a great way to sneak an extra serving of vegetables onto the dinner table.

chunks of butternut squash ready to cook.

The squash adds nutrition and body to the sauce while reducing the calories of the all dairy versions. Plus butternut squash adds potassium and fiber to the dish which your blood pressure and digestive system will thank you for.

Plus the sauce is still fast and easy. Just cook the butternut squash with a little bit of butter, cream and water.

Once the squash is tender use an immersion blender to blend into into a smooth sauce. Or spoon it into a traditional blender, but be careful because the mixture is hot and the steam can build up pressure.

Add the pasta and Parmesan cheese. Use a little pasta water to thin it out if needed.

The starch in the pasta water will help the sauce to really stick to the pasta. It’s like a magic trick that helps sauces.

Substitutions and additions

Nutmeg is a traditional addition to cream sauces. Of course it goes well with squash as well.

So it is a natural addition to this sauce. However, if you want a more traditional alfredo flavor feel free to leave it out and highlight the garlic instead.

If you are using fresh garlic, cook it in the butter until the garlic is fragrant. Then cook the rest of the recipe as written.

Rosemary would be another fabulous flavor addition. Steep a small sprig while cooking the squash and remove it before blending for a big flavor punch.

Feel free to use whatever pasta you like. We like whole wheat, but you can easily use gluten free or your personal preference.

Also use any shape. Fettuccine is a classic with alfredo but we also like rotini or penne.

Plate of fettucine pasta coated in butternut squash alfredo sauce with a sprinkling of parsley.

This pasta is great on its own. But it is also great with traditional Alfredo additions.

Throw some cooked chicken in to make it a meal. Shrimp would be fabulous as well.

When I made the penne version for the video, I stirred in bits of Italian sausage and that was delicious. The possibilities are endless.

Much like in pumpkin pepper jack macaroni and cheese, bacon would bring a nice smoky addition to this dish as well. Sprinkle some crumbled bacon on top for a next level experience.

More butternut squash recipes

Make delicious roasted butternut squash quickly and easily in your air fryer. It is a great way to get a flavorful veggie side on your dinner plate!

Butternut risotto is the perfect fall comfort food. It is fancy enough for a dinner party but is all the creamy, comforting goodness you want it to be.

Brown sugar butternut squash highlights the inherent sweetness of the squash. Butter and brown sugar are sure to make it a hit.

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Yield: 6 Servings

Butternut Squash Alfredo Sauce

Fork filled with butternut squash alfredo sauce coated pasta ready to eat.

Creamy butternut squash alfredo sauce has all of the cheesy richness you would expect in a good Alfredo with a lighter twist. The butternut squash brings great color and a little bit of a sweet and earthy undertone that makes it extra delicious.

Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes

Ingredients

  • 1 pound butternut squash, cubed (approximately 4 cups)
  • 1 pound fettuccine
  • 3/4 cup heavy cream
  • 3 Tablespoons unsalted butter
  • 1 cup freshly grated parmesan
  • 1/2 teaspoon freshly grated nutmeg
  • 1/4 teaspoon ground black pepper
  • 1/2 teaspoon garlic powder
  • Kosher salt to taste

Instructions

    1. Add the squash, heavy cream, butter and ¾ cup of water to a large saucepan, bring to a boil.  Reduce to simmer and let cook until the squash is tender enough to be broken with a fork. 
    2. Add to blender or use an immersion blender to puree until creamy and smooth.  Add the nutmeg, garlic, pepper and kosher salt. 
    3. In the meantime, prepare the fettuccine according to the package directions.  Before straining, reserve about ¾ cup of the pasta water.  Add the strained pasta and parmesan to the pureed squash mixture and stir until well coated.  If you need to thin the sauce, add the reserved pasta water a little bit at a time. 
    4. Sprinkle nutmeg and parmesan on pasta before serving if desired.

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Nutrition Information:

Yield:

6

Serving Size:

1

Amount Per Serving: Calories: 347Total Fat: 20gSaturated Fat: 12gTrans Fat: 0gUnsaturated Fat: 6gCholesterol: 59mgSodium: 271mgCarbohydrates: 34gFiber: 4gSugar: 3gProtein: 9g

All nutritional information is estimated and will depend on the exact ingredients you use.

Did you make this recipe?

I'd love to see it! Share a picture on Instagram or Pinterest and tag me @carleecooks to let me know how it went!

Creamy butternut squash alfredo sauce has all of the cheesy richness you would expect in a good Alfredo with a lighter twist. The butternut squash brings great color and a little bit of a sweet and earthy undertone that makes it extra delicious.

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Andrea Nine

Wednesday 17th of November 2021

I love anything with butternut squash!. Add in Alfredo and this is a big-time winner my friend!

Carlee

Wednesday 17th of November 2021

The flavors work really well together 😋

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