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Red Pepper Alfredo Sauce with Cashews and Nutritional Yeast Recipe

Published: Aug 16, 2026 by Eliza · This post may contain affiliate links · Leave a Comment

Jump to Recipe· 4.1 from 9 reviews

If you’re looking to jazz up your weeknight dinners with something silky, creamy, and packed with flavor, this Red Pepper Alfredo Sauce with Cashews and Nutritional Yeast Recipe is an absolute game changer. Imagine a luscious Alfredo without the dairy, where the sweetness of roasted red peppers meets the nuttiness of cashews and the cheesy depth of nutritional yeast—each bite brings a perfect balance that feels indulgent yet wholesome. It’s so simple to whip up, yet its vibrant color and rich texture make it feel fancy enough for company, making this sauce a staple you'll want to reach for again and again.

Ingredients You'll Need

A black pan filled with a layer of light yellow cooked fettuccine noodles sitting on a white marbled surface. A creamy, smooth light orange sauce is being poured from a clear container over the noodles, creating a thick layer of sauce on top in the center of the pan. The sauce flows down in the middle, covering parts of the noodles while the edges remain visible. Photo taken with an iphone --ar 4:5 --v 7

This recipe comes together with surprisingly straightforward ingredients that not only bring incredible flavor but also create that dreamy sauce texture. Each element plays a crucial role, ensuring your sauce is creamy, flavorful, and a little bit special.

  • Red Bell Pepper: Adds natural sweetness and a gorgeous red hue, whether you use raw or roasted for extra smokiness.
  • Raw Cashews: The secret to that rich, velvety base—soaked to blend into smooth perfection.
  • Nutritional Yeast: Provides a savory, cheesy depth that makes this Alfredo totally satisfying without any dairy.
  • Water: Helps to thin the sauce for a smooth, pourable consistency.
  • Salt: Enhances all the flavors and balances the sweetness of the peppers.
  • Onion Powder: Adds subtle savory warmth to the sauce.
  • Ground Turmeric: A pinch for a gentle earthiness and natural color boost.
  • Ground Nutmeg: Optional but highly recommended for that classic Alfredo hint of spice.
  • Pasta (or alternative): Choose your favorite—classic pasta, spaghetti squash, or even roasted veggies to soak up all that saucy goodness.

How to Make Red Pepper Alfredo Sauce with Cashews and Nutritional Yeast Recipe

Step 1: Prep the Cashews

Start by soaking your raw cashews for 6 to 8 hours in water. This soaking softens them, making them blend into a silky smooth texture that’s essential for a creamy sauce. Once soaked, drain and pat them dry to avoid watering down your sauce.

Step 2: Blend the Sauce Ingredients

Place your soaked cashews, red bell pepper (roasted if you want deeper flavor), nutritional yeast, water, salt, onion powder, turmeric, and nutmeg into a high-speed blender or food processor. Blend until the mixture is completely smooth and creamy—this is the heart of your sauce, so don’t rush it!

Step 3: Cook and Combine

While you cook your pasta in salted boiling water, gently heat your sauce in a pot until warm and ready to coat every strand. Drain the pasta but don’t rinse it, so it absorbs that delicious sauce perfectly. Then pour the sauce over the pasta, stir to combine, and toss in any cooked veggies or beans for extra flavor and texture.

How to Serve Red Pepper Alfredo Sauce with Cashews and Nutritional Yeast Recipe

A black pan filled with long, flat noodles that are fully covered in smooth, creamy orange sauce, making the noodles soft and shiny. On top, there are small pieces of bright green herb leaves scattered in the center. The pan rests on a white marbled texture. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

The sauce is fabulous on its own, but a sprinkle of fresh chopped herbs like basil or parsley adds a bright, fresh contrast. Toasted pine nuts or a handful of crispy breadcrumbs can provide a delightful crunch that contrasts beautifully with the creamy sauce.

Side Dishes

This Alfredo pairs wonderfully with a crisp side salad dressed lightly in lemon vinaigrette or some garlic-roasted broccoli to keep things green and vibrant on your plate. For a heartier meal, roasted beans or a few grilled vegetables make perfect companions.

Creative Ways to Present

Beyond pasta, try using this Red Pepper Alfredo Sauce with Cashews and Nutritional Yeast Recipe as a luscious dip for fresh veggies or as a sauce drizzle over baked potatoes. It also makes a scrumptious pizza base or a creamy addition to grain bowls, letting you enjoy its richness in versatile ways.

Make Ahead and Storage

Storing Leftovers

Store leftover sauce in an airtight container in the refrigerator for up to four days. It thickens a bit as it chills, so give it a good stir and maybe a splash of water when reheating.

Freezing

This sauce freezes beautifully, making it a fantastic batch-cooking option. Freeze in portion-sized containers or freezer bags for up to three months, and thaw in the fridge overnight before reheating.

Reheating

Gently warm your sauce over low heat on the stove, stirring often. Add small amounts of water if it feels too thick. Avoid high heat to preserve the silky texture and fresh flavors.

FAQs

Can I use roasted red peppers instead of raw?

Absolutely! Using roasted red peppers adds a smoky depth that makes the sauce even more flavorful, but raw red peppers keep it lighter and brighter. Both work beautifully depending on your mood.

Is nutritional yeast necessary?

While nutritional yeast provides that classic cheesy flavor and is a great vegan option, you can substitute Parmesan cheese if you prefer a dairy version. It’s crucial for adding umami and richness to the sauce.

Can I make this sauce nut-free?

Cashews are key for the creaminess, but you might try sunflower seeds or soaked white beans as alternatives. The texture may differ slightly, so adjust blending times accordingly.

What pasta types work best with this sauce?

Any pasta you love goes well here—from classic spaghetti to gluten-free varieties or even spiralized vegetables. The sauce clings wonderfully to all shapes, making each bite delightful.

Can I add protein directly to the sauce?

Definitely! Stirring in cooked beans, lentils, or even grilled chicken can make this sauce a one-pan wonder meal packed with protein and flavor.

Final Thoughts

Once you try this Red Pepper Alfredo Sauce with Cashews and Nutritional Yeast Recipe, it’s hard not to fall in love. The blend of natural sweetness, creamy cashew richness, and savory nutritional yeast creates a truly satisfying sauce that feels both indulgent and nourishing. Whip it up for an easy midweek treat or impress friends with a comforting dinner that’s as beautiful as it is delicious. Your pasta nights just got a major upgrade.

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Red Pepper Alfredo Sauce with Cashews and Nutritional Yeast Recipe

Red Pepper Alfredo Sauce with Cashews and Nutritional Yeast Recipe


5 Stars 4 Stars 3 Stars 2 Stars 1 Star

4.1 from 9 reviews

  • Author: Eliza
  • Total Time: 6 hours 20 minutes
  • Yield: 5 servings
  • Diet: Vegan
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Description

A creamy and flavorful Red Pepper Alfredo Sauce made with roasted red bell pepper and cashews, blended with nutritional yeast and spices for a dairy-free, vegan alternative to traditional Alfredo sauce. Perfectly paired with pasta, spaghetti squash, or steamed vegetables, this sauce is quick to prepare and customizable with your favorite add-ins.


Ingredients

Sauce Ingredients

  • 1 red bell pepper (raw or roasted)
  • ½ cup water
  • ½ cup raw cashews (or macadamia nuts)
  • ¼ cup nutritional yeast (or Parmesan cheese)
  • 1 tsp salt
  • 2 tsp onion powder
  • ½ tsp ground turmeric
  • ⅛ tsp ground nutmeg (optional)

Main Dish Ingredients

  • 10 oz pasta (or spaghetti squash or vegetables)
  • Optional: grilled or roasted vegetables, beans, or other add-ins


Instructions

  1. Soak Nuts: Place the raw cashews in a cereal bowl, cover with water, and let them soak for 6-8 hours to soften. After soaking, drain completely and pat dry with a clean towel.
  2. Blend Sauce: In a food processor or high-speed blender, combine the drained cashews, red bell pepper, nutritional yeast, salt, onion powder, turmeric, nutmeg (if using), and ½ cup water. Blend until the mixture is completely smooth and creamy.
  3. Cook Pasta: While preparing the sauce, cook the pasta in a separate pot of salted boiling water according to the package directions until al dente. Drain the pasta thoroughly but do not rinse it.
  4. Heat Sauce: Transfer the blended sauce to a pot and gently heat over medium-low heat until it reaches the desired serving temperature, stirring occasionally to prevent sticking.
  5. Combine and Serve: Pour the warm red pepper Alfredo sauce over the drained pasta. Stir in any optional cooked vegetables, beans, or other add-ins of your choice. Season with additional salt and freshly ground pepper to taste, then serve immediately.

Notes

  • Soaking nuts overnight softens them for a smoother sauce texture.
  • You can roast the red bell pepper for a smokier flavor or use it raw for a fresher taste.
  • Nutritional yeast provides a cheesy flavor and makes this sauce vegan; Parmesan cheese can be substituted for a non-vegan option.
  • This sauce also works well with spaghetti squash or steamed vegetables as a low-carb alternative.
  • Adjust seasoning like salt and pepper at the end for optimal flavor balance.
  • Prep Time: 6 hours 10 minutes
  • Cook Time: 10 minutes
  • Category: Sauce
  • Method: Blending
  • Cuisine: American

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Hi there! I’m Eliza, I’m a passionate home cook, recipe creator, and storyteller who believes that food is a universal language that connects us all. I live with my little boy, Ely, and together we fill our kitchen with laughter, love, and the comforting aroma of something delicious made with care.

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