If you’re craving something creamy, dreamy, and packed with flavor—without spending hours in the kitchen—let me introduce you to the ultimate game-changer: Red Pepper Alfredo Sauce! This is a recipe that brings all the classic comfort of Alfredo, but with a fresh, roasted red pepper twist that will absolutely transform your pasta night. Silky-smooth, subtly sweet, and just a touch nutty, this lighter, vibrant sauce comes together in about ten minutes, making it the go-to for busy weeknights. Throw it over your favorite pasta, toss in some quick veggies, or spoon it onto spaghetti squash for a meal that’ll have everyone coming back for seconds.

Why You’ll Love This Recipe

  • Unbelievably Quick & Easy: The entire sauce comes together in the blender in just minutes—no complicated steps, no long simmering required.
  • Irresistibly Creamy Texture: Thanks to blended cashews or macadamia nuts, the sauce is thick, rich, and coats every strand of pasta like a hug.
  • Full of Deep, Roasted Flavors: Red bell pepper adds a beautiful sweetness and depth you just don’t get with standard Alfredo.
  • Totally Customizable: Works with any pasta, vegetable noodles, or grain. You can make it vegan, dairy-laden, gluten-free, or whatever your heart (and pantry) desires!
  • Nutritious and Comforting: Loaded with protein from the nuts, B vitamins from nutritional yeast (or feel free to use Parmesan if you prefer), and the antioxidant punch of peppers.

Ingredients You’ll Need

Gather these simple, powerhouse ingredients for your best Alfredo yet:

  • Red Bell Pepper: Raw for bright, fresh flavor, or roasted if you prefer a smoky, mellow vibe. Seriously, it makes a difference!
  • Water: The blender needs a little liquid for that ultra-smooth, silky puree.
  • Raw Cashews or Macadamia Nuts: Soaked first for maximum creaminess—this is the secret to that luscious, dairy-free texture.
  • Nutritional Yeast or Parmesan Cheese: Choose nutritional yeast for a nutty, cheesy flavor that’s vegan or Parmesan for classic Italian richness.
  • Salt: Essential for bringing everything to life—don’t skimp!
  • Onion Powder: Adds a gentle sweetness and depth to the sauce; a total flavor booster.
  • Ground Turmeric: Not just for color, this brings subtle earthiness, making the sauce shine (and helps mimic that golden Alfredo hue).
  • Ground Nutmeg (Optional): Just a pinch for classic Alfredo warmth, especially if you love those nostalgic Italian notes.
  • Pasta, Spaghetti Squash, or Vegetables: Choose your favorite—traditional pasta, gluten-free varieties, or spiralized veggies for a lighter meal.
  • Optional Add-ins: Throw in some grilled or roasted vegetables or beans for extra texture and nutrition. Totally up to you!

Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.

Variations

Want to experiment and make this sauce totally your own? Here are some ideas:

  • Go Roasted: Roast the red bell pepper for a smokier, sweeter sauce. It’s worth the extra five minutes if you have it!
  • Add Spice: Love a little heat? Toss in a pinch of red pepper flakes or cayenne when blending.
  • Cheesy Upgrade: Use half Parmesan and half nutritional yeast if you can’t decide, or double up on your favorite.
  • Protein Punch: Amp up the meal with white beans or chickpeas blended right into the sauce, or scatter them over the finished bowl.
  • Swap the Nuts: Macadamias are even richer than cashews and work beautifully for a slightly different flavor.
  • Bulk it Up: Stir in spinach, sun-dried tomatoes, or grilled zucchini before serving for even more goodness.

How to Make Red Pepper Alfredo Sauce

Step 1: Soak the Nuts

Place cashews or macadamia nuts in a bowl. Cover with water and let them soak for 6-8 hours (overnight works, too). This softens them for the creamiest, silkiest sauce.

Step 2: Blend the Sauce

Drain the soaked nuts and gently pat them dry. In a high-speed blender or food processor, add the red bell pepper (raw or roasted), the soaked nuts, water, nutritional yeast or Parmesan, salt, onion powder, turmeric, and nutmeg (if using). Blend until the mixture is completely smooth and velvety—no grainy bits allowed. Taste and adjust seasoning if you like.

Step 3: Heat the Sauce

Pour the blended sauce into a saucepan and gently warm over medium heat until it reaches your desired serving temperature. Stir occasionally as it heats; this only takes a few minutes and makes the flavors pop.

Step 4: Cook the Pasta

Meanwhile, cook your pasta, veggie noodles, or spaghetti squash according to package instructions. Don’t forget a generous pinch of salt in the water—this is your only chance to season the pasta itself!

Step 5: Combine and Serve

Drain the cooked pasta well (don’t rinse it—starchy pasta helps the sauce stick). Pour the hot red pepper Alfredo sauce over the pasta or vegetables, toss gently to coat, and mix in any extra veggies or beans you love. Season with freshly cracked black pepper and serve up immediately.

Pro Tips for Making the Recipe

  • Blend Until Ultra-Smooth: Be patient with the blender! The longer you blend, the creamier your sauce.
  • Taste and Adjust: After blending, trust your taste buds—add more salt, nutritional yeast, or a squeeze of lemon juice if you want a tangier finish.
  • Warm Gently: Don’t boil it; you just want to heat the sauce, not cook it for long or it may thicken too much.
  • Pasta Water Magic: Save a splash of pasta cooking water. If your sauce is too thick, add a little at a time to loosen it to your preferred texture.
  • Double Batch: This sauce freezes great—make extra and thank yourself later!

How to Serve

Red Pepper Alfredo Sauce works with just about everything, but here are some favorites:

  • Classic Pasta or Fettuccine: Tossed hot with broad noodles for the coziest bowl.
  • Vegetable Noodles: Pair with spiralized zucchini, carrot ribbons, or spaghetti squash for a lighter take.
  • Loaded Bowls: Top with charred broccoli, sautéed mushrooms, peas, or whatever veggies are lingering in your fridge.
  • As a Casserole Base: Use it in place of classic Alfredo for baked pasta bakes—your family will ask for it again and again.
  • Crusty Bread or Garlic Knots: For mopping up those last drops—highly recommended!

Make Ahead and Storage

Storing Leftovers

Spoon leftover sauce (separate from pasta if possible) into an airtight container and refrigerate for up to 5 days. It may thicken as it sits—just add a splash of water or milk when reheating.

Freezing

Red Pepper Alfredo Sauce is excellent for batch cooking! Freeze in small containers or silicone molds for up to 2 months. Thaw overnight in the fridge, then re-blend for best texture.

Reheating

Warm gently on the stove over low heat, stirring frequently. Add a little water or plant milk to loosen if needed. If using a microwave, heat in short bursts and stir well—creamy sauces like to be fussed over just a little.

FAQs

  1. Can I make this Alfredo sauce without nuts?

    Absolutely! Try substituting soaked sunflower seeds or white beans for a nut-free version. While the texture won’t be quite as rich, you’ll still have a fantastic, creamy result.

  2. Do I need a high-powered blender?

    A high-speed blender makes things flawlessly smooth, but a good food processor will work. Just be sure to soak the nuts really well and blend a little longer for the best texture.

  3. Can I use jarred roasted red peppers instead of fresh?

    Yes! Jarred roasted peppers are a great shortcut and add wonderful smoky depth, just drain very well to avoid thinning your sauce too much.

  4. Is this recipe vegan and gluten-free?

    If made with nutritional yeast and paired with gluten-free pasta or veggies, the sauce is completely vegan and gluten-free. Use Parmesan and traditional pasta for a classic twist if preferred.

Final Thoughts

Ready to level up your weeknight dinner routine? This Red Pepper Alfredo Sauce recipe is here to make your life easier, tastier, and maybe—just maybe—a little more colorful. So soak those nuts, fire up the blender, and dive in. Every bite is creamy, hearty, and bursting with flavor—perfect for the busiest nights or a cozy meal with friends. Don’t be afraid to play around with the mix-ins and find your own perfect version! Happy cooking!

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Red Pepper Alfredo Sauce Recipe

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  • Author: Evelyn
  • Prep Time: 10 minutes (plus 6-8 hours soaking time)
  • Cook Time: 0 minutes (sauce is no-cook, just heated; cooking time for pasta varies)
  • Total Time: 10 minutes (excluding soaking and pasta cook time)
  • Yield: 5 servings 1x
  • Category: Sauces-condiments
  • Method: Blending
  • Cuisine: American/Italian-inspired
  • Diet: Vegan

Description

This creamy Red Pepper Alfredo Sauce is a healthy, dairy-free alternative to traditional Alfredo, made with roasted red peppers, cashews or macadamia nuts, and flavorful seasonings. Perfect for tossing with pasta, spaghetti squash, or veggies, it’s simple to make and packs a punch of flavor and nutrition.


Ingredients

Units Scale

Nuts & Base

  • 1/2 cup raw cashews or macadamia nuts
  • 1/2 cup water

Flavorings

  • 1 red bell pepper (raw or roasted)
  • 1/4 cup nutritional yeast or Parmesan cheese
  • 1 tsp salt
  • 2 tsp onion powder
  • 1/2 tsp ground turmeric
  • 1/8 tsp ground nutmeg (optional)

To Serve

  • 10 oz pasta, spaghetti squash, or vegetables
  • Optional: grilled or roasted veggies, beans, etc.

Instructions

  1. Soak the nuts – Place the raw cashews or macadamia nuts in a cereal bowl, cover with water, and let soak for 6-8 hours to soften. After soaking, drain fully and pat dry to ensure a creamy sauce.
  2. Blend the sauce – In a food processor or high-speed blender, combine the soaked and drained nuts, 1/2 cup water, red bell pepper, nutritional yeast or Parmesan, salt, onion powder, turmeric, and nutmeg (if using). Blend until completely smooth and creamy.
  3. Cook pasta and heat sauce – While preparing the sauce, cook your pasta, spaghetti squash, or vegetables according to package directions in salted water. Separately, transfer the blended sauce to a pot and heat over medium until just warmed through, stirring occasionally.
  4. Assemble and serve – Drain the cooked pasta (do not rinse), then pour the warm Alfredo sauce over the pasta. Toss well to combine, seasoning with additional salt and pepper if desired. Add in any optional cooked vegetables, beans, or preferred add-ins before serving.

Notes

  • For extra depth, roast the red bell pepper before blending for a smokier flavor.
  • You can substitute nutritional yeast with Parmesan cheese for a non-vegan version.
  • Soaking the nuts overnight ensures the creamiest texture.
  • This sauce works great over spiralized veggies, zoodles, or as a dip for roasted vegetables.

Nutrition

  • Serving Size: About 1/5 of recipe (sauce only)
  • Calories: 90
  • Sugar: 2g
  • Sodium: 480mg
  • Fat: 6g
  • Saturated Fat: 1g
  • Unsaturated Fat: 5g
  • Trans Fat: 0g
  • Carbohydrates: 7g
  • Fiber: 2g
  • Protein: 3g
  • Cholesterol: 0mg

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