Peruvian Green Sauce
I learned this Peruvian green sauce from a friend who swore it fixed nearly every dinner dilemma. It’s the kind of sauce you make with your hands full of groceries and a mind full of deadlines: quick, forgiving, and reassuringly punchy. Bright cilantro, garlic, and jalapeño come together with mayo and mustard to make a sauce that plays well with everything from roasted vegetables to sandwiches.
This version is straightforward and repeatable. There’s a small sauté step for the onion to take the sharp edge off, and then everything goes in the blender. Read through once, gather the ingredients, and you’ll have it ready in under 15 minutes. I’ll cover the exact steps, why each ingredient matters, and a handful of practical tips so it turns out great every time.
No gimmicks. Just a dependable, lively green sauce that stores well and elevates simple weeknight plates. If you like bold, herb-forward sauces that come together in a single blender, this is one you’ll return to again and again.
Shopping List
- 2 tablespoons olive oil
- 1/4 cup chopped red onion
- 1/2 cup light Hellman’s mayonnaise (note: the source suggests using compliant mayo for Whole30)
- 2 tablespoons white vinegar
- 4 teaspoons yellow mustard (Gulden’s)
- 1/2 teaspoon kosher salt
- 1/4 teaspoon freshly ground black pepper
- 3 jalapeños, roughly chopped (seeded but keep the ribs; about 1 cup/3 oz)
- 2 cups chopped fresh cilantro leaves and stems (about 2 oz, rinsed well)
- 3 medium cloves garlic (to crush through a press)
Peruvian Green Sauce: Step-by-Step Guide
- Prep the produce: rinse the cilantro and roughly chop the leaves and stems; roughly chop the jalapeños, removing the seeds but keeping the white ribs (about 1 cup/3 oz); crush the garlic cloves through a garlic press; chop the red onion.
- Heat a small skillet over medium heat. Add 1 teaspoon of the measured 2 tablespoons olive oil and sauté the chopped red onion, stirring, until soft, about 3 to 4 minutes.
- Transfer the sautéed onion to a blender and let it cool for 1 to 2 minutes.
- Add the remaining olive oil (the rest of the measured 2 tablespoons), the 1/2 cup mayonnaise, 2 tablespoons white vinegar, 4 teaspoons yellow mustard, 1/2 teaspoon kosher salt, and 1/4 teaspoon freshly ground black pepper to the blender.
- Add the prepared jalapeños, the 2 cups chopped cilantro, and the crushed garlic to the blender. Secure the lid.
- Blend on high until the sauce is smooth and creamy, about 30 seconds. If needed, stop, scrape down the sides, and blend again until fully smooth.
Ingredients
- 2 tablespoons olive oil — split use: 1 tsp for sautéing the onion, the rest adds body and silk to the sauce.
- 1/4 cup chopped red onion — sautés briefly to mellow sharpness and add sweetness.
- 1/2 cup light Hellman’s mayonnaise — creates creaminess and rounds the heat; the source notes a compliant mayo option for Whole30.
- 2 tablespoons white vinegar — provides bright acidity to balance the oil and mayo.
- 4 teaspoons yellow mustard, Gulden’s — adds tang and a bit of depth; small amount but noticeable.
- 1/2 teaspoon kosher salt — essential for seasoning and drawing out flavors.
- 1/4 teaspoon freshly ground black pepper — fresh grind makes a subtle peppery background note.
- 3 jalapeños, roughly chopped seeded but keeping the ribs (about 1 cup/3 oz) — primary source of heat and green chili flavor; ribs hold a lot of the chili’s character.
- 2 cups chopped fresh cilantro leaves and stems, 2 oz rinsed well — the herb backbone of the sauce; stems contribute bright green flavor.
- 3 medium cloves garlic, crushed through a press — raw garlic delivers the sauce’s assertive punch; crushing helps it blend seamlessly.
Top Reasons to Make Peruvian Green Sauce
This sauce is fast. From chopping to blending you’re looking at well under 15 minutes. That speed makes it perfect for busy nights or last-minute gatherings.
It’s versatile. The creamy, herbal, and slightly tangy profile brightens grilled proteins, roasted vegetables, sandwiches, and bowls. It’s a layered sauce—mildly spicy from the jalapeño, herbaceous from the cilantro, and balanced by mayo and vinegar.
It’s forgiving. The recipe tolerates small tweaks in heat and herb quantity. If your cilantro bunch is large or small, the overall texture and flavor still come together because of the mayo and mustard stabilizers.
Budget & Availability Swaps
Stick to the core list when you can, because each ingredient serves a clear role. But you can tweak within what’s listed:
- If jalapeños are very hot, reduce to 2 and keep the ribs—heat level drops without losing the green chili flavor.
- If you have limited olive oil, hold back the second tablespoon until blending to adjust texture with less oil.
- If your cilantro bunch is small, use what you have and reduce the jalapeño slightly so the sauce stays balanced.
- For a Whole30-friendly version, follow the note in the ingredients and choose a compliant mayonnaise as specified.
Setup & Equipment
Minimal equipment makes this recipe approachable. You need a small skillet, a blender, a garlic press, and basic prep tools (knife and cutting board). The skillet is used only to soften the red onion—don’t skip that step if you want a rounded, less sharp sauce.
Use a blender rather than a food processor if you can. A high, narrow blender jar creates a smoother emulsion quickly. If your blender isn’t very powerful, blend in short bursts and scrape the sides once or twice to fully homogenize.
Watch Outs & How to Fix
Too thin: If you over-blend or add too much oil, the sauce can become runny. Fix it by blending in a little extra cilantro or a small additional spoon of mayonnaise to thicken and rebalance.
Too thick: Add a teaspoon of water or a splash of the measured white vinegar and blend briefly until you reach the desired consistency. Go slowly—small additions go a long way.
Too spicy: Remove seeds and keep ribs as instructed. If it’s still hotter than you like, mellow it by adding another tablespoon of mayonnaise (within reason) or a few more cilantro leaves if you have them.
Onion too sharp: The sauté step cuts the raw bite. If you skipped it and find the onion too pungent, let the sauce rest in the fridge for 30 minutes—the flavors soften. You can also quickly sauté the onions after the fact and stir them in once cooled.
In-Season Flavor Ideas
When cilantro is prolific, this sauce sings. Use extra cilantro for a greener, brighter sauce that pairs beautifully with the fresh produce of summer and late spring. In cooler months when cilantro is less vibrant, reduce the jalapeño slightly and let the mustard and vinegar take up more of the balancing work.
Garlic varies by season too. If your garlic is very young (mild), the sauce will be gently aromatic. If it’s older and sharper, be conservative—three medium cloves is the recipe baseline.
Little Things that Matter
Rinsing the cilantro removes grit and a slight bitterness that can accumulate in the stems. Don’t skip rinsing, and shake or spin it dry so you don’t water down the sauce.
Crushing the garlic rather than mincing ensures it fully incorporates during blending, avoiding occasional raw chunks. Pressing also releases a more immediate garlic flavor.
Letting the sautéed onion cool briefly before blending keeps the mayo from warming and splitting—one minute matters.
Shelf Life & Storage
Stored in an airtight container in the refrigerator, this sauce will keep well for 4 to 5 days. The mayonnaise and acidity help preserve freshness, but the flavor is best within the first 48–72 hours when the cilantro is brightest.
If separation occurs, give the jar a good stir or blitz briefly in the blender to reincorporate. For longer storage, freezing is not ideal because mayonnaise can separate and the texture will change when thawed.
Questions People Ask
Q: Can I make this without a blender? A: You could finely mince everything and whisk, but the texture won’t be as smooth or cohesive. A blender creates the emulsion that defines this sauce.
Q: How spicy is it? A: Moderate and adjustable. The recipe calls for 3 jalapeños with seeds removed but ribs kept. For milder sauce, reduce to 2 or remove the ribs as well.
Q: Can I use less mayo or a different mayo? A: The recipe specifies 1/2 cup light Hellman’s and notes a compliant mayo option for Whole30. You can reduce slightly, but the mayo provides body and creaminess—cutting too much will change the texture markedly.
Q: Will the cilantro flavor fade? A: Yes, slightly over days. This sauce is best fresh or within a couple of days when the herb flavor is most vibrant.
Make It Tonight
Start by rinsing the cilantro and roughly chopping the leaves and stems. Get the jalapeños seeded and ribbed, crush the garlic, and chop the onion. Heat a small skillet, sauté the onion in 1 teaspoon of olive oil for 3–4 minutes, then transfer to the blender and let cool for a minute. Add the remaining olive oil, the 1/2 cup mayonnaise, 2 tablespoons white vinegar, 4 teaspoons yellow mustard, 1/2 teaspoon kosher salt, 1/4 teaspoon black pepper, the jalapeños, cilantro, and garlic. Blend on high until smooth, about 30 seconds. Taste and adjust salt or heat only if needed.
Serve immediately or chill for 20 minutes to let the flavors marry. Spoon it over roasted vegetables, use it as a sandwich spread, or keep it in the fridge and let it rescue dinners all week.
Peruvian Green Sauce
Ingredients
Ingredients
- 2 tablespoonsolive oil
- 1/4 cupchopped red onion
- 1/2 cuplight Hellman’s mayonnaise use compliant mayo for whole30
- 2 tablespoonswhite vinegar
- 4 teaspoonsyellow mustard Guldens
- 1/2 teaspoonkosher salt
- 1/4 teaspoonfreshly ground black pepper
- 3 jalapeños roughly chopped seeded but keeping the ribs (about 1 cup/3 oz)
- 2 cupschopped fresh cilantro leaves and stems 2 oz rinsed well
- 3 medium cloves garlic crushed through a press
Instructions
Instructions
- Prep the produce: rinse the cilantro and roughly chop the leaves and stems; roughly chop the jalapeños, removing the seeds but keeping the white ribs (about 1 cup/3 oz); crush the garlic cloves through a garlic press; chop the red onion.
- Heat a small skillet over medium heat. Add 1 teaspoon of the measured 2 tablespoons olive oil and sauté the chopped red onion, stirring, until soft, about 3 to 4 minutes.
- Transfer the sautéed onion to a blender and let it cool for 1 to 2 minutes.
- Add the remaining olive oil (the rest of the measured 2 tablespoons), the 1/2 cup mayonnaise, 2 tablespoons white vinegar, 4 teaspoons yellow mustard, 1/2 teaspoon kosher salt, and 1/4 teaspoon freshly ground black pepper to the blender.
- Add the prepared jalapeños, the 2 cups chopped cilantro, and the crushed garlic to the blender. Secure the lid.
- Blend on high until the sauce is smooth and creamy, about 30 seconds. If needed, stop, scrape down the sides, and blend again until fully smooth.
Equipment
- Small Skillet
- Blender
- Garlic press
