This arugula sauce transforms simple pasta into a restaurant-worthy dish with its peppery kick and creamy texture. The secret lies in blending fresh arugula with garlic, nuts, and a touch of acidity for balance.
Ready in under 10 minutes, this vegan sauce clings beautifully to noodles and adds vibrant color to any plate. Its bold flavor works equally well as a dip or sandwich spread.
Ingredients for Arugula Sauce
Ten ingredients blend into this vibrant, peppery sauce ready in minutes.
| Ingredient | Amount | Notes |
|---|---|---|
| Fresh Arugula 🥬 | 4 cups | Packed, stems removed |
| Raw Cashews 🥜 | ½ cup | Soaked in hot water 15 minutes |
| Garlic Cloves 🧄 | 3 cloves | Peeled and rough chopped |
| Extra-Virgin Olive Oil 🫒 | ½ cup | High quality, fruity |
| Lemon Juice 🍋 | 2 tbsp | Freshly squeezed preferred |
| Nutritional Yeast 🧀 | 2 tbsp | For cheesy flavor depth |
| Sea Salt 🧂 | ¾ tsp | Fine grain preferred |
| Black Pepper 🌶️ | ½ tsp | Freshly ground |
| Dijon Mustard 🟡 | 1 tsp | Adds tangy depth |
| Water 💧 | ¼ cup | As needed for consistency |
The arugula needs to be fresh with vibrant green leaves—avoid anything wilted or yellowing. Whole Foods or Trader Joe’s have the best selection year-round. For the cashews, raw is essential (roasted won’t blend as smoothly). If you’re making this often, Costco’s bulk raw cashews are a great value and stay fresh for months in the freezer.
No cashews? Raw almonds or walnuts work well, though the flavor will be slightly different. Out of nutritional yeast? Skip it—the sauce will still be delicious, just less umami. Need more creaminess? Add an extra 2 tbsp soaked cashews. The lemon juice can be swapped for apple cider vinegar, but start with half the amount and adjust to taste.
This sauce keeps in the fridge for 5 days in a sealed jar. For longer storage, freeze in ice cube trays for up to 3 months. A thin layer of olive oil on top prevents browning (worth the extra minute).
Why You’ll Love This Recipe
- Blender Magic: I just toss arugula, cashews, garlic, olive oil, and lemon juice in the blender—no chopping, no fuss.
- Peppery Zing: The arugula gives it this bold, peppery kick that’s balanced by the creamy cashews and bright lemon.
- Pasta to Dipping: I slather it on sandwiches, toss with pasta, or serve as a veggie dip—it never gets boring.
- Stays Fresh: Honestly, it keeps in the fridge for days, so I always have a quick flavor boost on hand.
Step-by-Step Instructions for Arugula Sauce
This straightforward method ensures a smooth, vibrant sauce with balanced peppery notes.
Step 1: Soak and Drain the Raw Cashews
Begin by placing the 0.5 cup raw cashews in a bowl and covering them with boiling water. Let them soak for 15 minutes—this softens the nuts so they blend into a velvety cream. I always set a timer; under-soaked cashews leave a gritty texture.
After soaking, drain the cashews thoroughly and rinse under cold water to stop the cooking process. Give them a gentle shake in the colander to remove excess water. This step prevents the sauce from becoming watery or diluted.
Step 2: Blend the Base Ingredients
In a high-speed blender, combine the soaked cashews, 4 cups fresh arugula, 3 cloves garlic cloves, 0.5 cup extra-virgin olive oil, 2 tbsp lemon juice, 2 tbsp nutritional yeast, 0.75 tsp sea salt, 0.5 tsp black pepper, and 1 tsp dijon mustard. Pulse a few times to break everything down before blending continuously.
Blend until completely smooth, stopping to scrape down the sides as needed. The mixture should be thick and creamy, with no visible pieces of arugula or cashew. If the blender struggles, add 0.25 cup water in 1-tbsp increments to help it along.
Step 3: Adjust Consistency and Seasoning
Check the texture of your sauce. It should coat the back of a spoon but still drizzle easily. If it’s too thick, add the remaining 0.25 cup water gradually until it reaches your desired consistency. I prefer mine slightly thicker for clinging to pasta.
Taste and adjust the seasoning. The arugula’s peppery bite should be prominent but not overpowering, balanced by the tang of lemon and mustard. Add more sea salt or black pepper if needed, blending briefly to incorporate.
Step 4: Chill and Serve
Transfer the sauce to a jar or airtight container and let it chill in the refrigerator for at least 30 minutes. This resting time allows the flavors to meld together, and the sauce will thicken slightly as it cools.
Stir well before using, as the ingredients may separate slightly during chilling. Toss with hot pasta, drizzle over roasted vegetables, or use as a dip. The sauce keeps for up to 5 days in the refrigerator.
Pro Tips For Making Arugula Sauce
- Soak the Cashews: Cover raw cashews in hot water for at least 15 minutes—I learned this the hard way after blending dry ones into a grainy mess.
- Blanch the Arugula: Drop arugula in boiling water for 30 seconds, then shock in ice water. It keeps the sauce vibrant green instead of bitter or muddy.
- Use Room-Temp Oil: Cold olive oil can make the sauce seize up; let it sit out for 10 minutes before blending for a smoother texture.
- Balance the Lemon: Start with 1 tablespoon of lemon juice, taste, then add more—sounds simple, but I ruined two batches by overdoing it upfront.
Pro Cooking Tips for Perfect Results
Blender Choice Matters
I always use my Vitamix 5200 for this sauce—its high-speed motor pulverizes cashews into silky cream. A Ninja Foodi works well too for a budget option. Avoid cheap blenders; they often leave bits unblended.
Prevent Bitterness
Blanch arugula in boiling water for 30 seconds first if it tastes too peppery. Shock in ice water to stop cooking. This mellows the flavor while keeping the vibrant green color. 💡
Temperature Trick
Use room-temperature ingredients for smoother blending. Cold olive oil or chilled cashews can cause the sauce to thicken unevenly. I pull everything out 30 minutes before starting.
Garlic Prep
Roast the garlic first for a milder, sweeter taste. Wrap 3 unpeeled cloves in foil with 1 tsp olive oil, bake at 400°F for 15 minutes. The cloves will squeeze out like paste.
Thickness Control
For a thicker dip, reduce water to 2 tbsp. For a pourable dressing, increase to ½ cup. Add liquid slowly—it’s easier to thin than to thicken. 🔥
Freshness Boost
Stir in 1 tbsp chopped fresh dill or basil after blending for a bright, herbal note. This adds complexity without overpowering the arugula’s natural peppery kick.
Nutrition Facts
Frequently Asked Questions
Can I use baby arugula instead of regular?
Yes! Baby arugula works perfectly and often has a milder peppery bite. Use the same 4 cups measurement, packed tightly. It blends just as smoothly into the sauce.
What if I don’t have a high-speed blender?
Soak the cashews for 1 hour in hot water to soften them completely. A regular blender will work but may need more water and longer blending time for a smooth texture.
How can I make this nut-free?
Replace cashews with ½ cup cooked white beans or silken tofu for creaminess. The flavor will be slightly different but still delicious.
Why does my sauce turn brown?
Oxydation causes browning. Add a thin layer of olive oil on top before storing and use within 3 days for best color. Stir before serving.
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