Salsa de Ajo Blanco: Creamy Spanish Garlic Sauce

Salsa de ajo blanco is a cool, creamy Spanish sauce made with almonds, garlic, bread, olive oil, and vinegar. Related to Andalusian ajo blanco soup, this thicker version is blended as a dip or drizzle for vegetables, seafood, grilled meats, and bread; recipes vary in the bread-to-almond ratio and seasoning.

Ingredients

1 cup (140 g) blanched almonds, unsalted
1½ ounces (43 g) day-old white bread, crusts removed, about 1 thick slice
½ cup (120 ml) cold water, plus 1–3 tablespoons (15–45 ml) as needed
1 medium garlic clove, peeled and roughly chopped (about 5 g); use ½ clove for a gentler sauce
2 tablespoons (30 ml) sherry vinegar
½ teaspoon fine salt, or to taste
⅓ cup (80 ml) extra-virgin olive oil
1 tablespoon (15 ml) cold water, for adjusting the texture if needed

Instructions

Soften the bread. Tear the bread into small pieces and place it in a bowl with ½ cup (120 ml) cold water. Leave for 10 minutes, until the bread is soft. If it is very dry, press it under the water so it hydrates evenly.
Load the blender. Put the almonds, softened bread and its soaking water, garlic, sherry vinegar, and salt in a high-speed blender. Blend for 1 minute, pause to scrape down the sides, then blend for another 1–2 minutes, until the almonds are as finely ground as possible.
Emulsify with oil. With the blender running on low, pour in the olive oil in a thin, steady stream. Once it is incorporated, blend on medium for 20–30 seconds. The sauce should look creamy and cohesive, not oily or grainy.
Adjust and chill. Taste and add a little more salt or vinegar if needed. For a thinner, pourable sauce, blend in cold water 1 tablespoon (15 ml) at a time. Cover and refrigerate for 30 minutes so the flavors settle and the sauce becomes cold. Stir before serving; if it has thickened, loosen it with another splash of water.

Tips

Use blanched almonds for a smooth finish. Skin-on almonds work if necessary, but the sauce will have a darker color and slightly more texture. If your blender is not powerful, soak the almonds in hot water for 20–30 minutes, drain, and cool them before blending; this extra step helps them break down.
Keep the garlic measured. One medium clove gives a clear but balanced garlic flavor. Garlic grows sharper as the sauce sits, so start with half a clove if you want a mild result and add more after blending.
Pour in the oil slowly. Adding it in a thin stream helps the mixture emulsify. If oil pools on the surface, stop adding it and blend until the sauce looks uniform before continuing.
Choose the right bread and vinegar. Plain white bread gives a neutral, thickening base. Sherry vinegar supplies a rounded Spanish-style tang; red wine vinegar is a convenient substitute but tastes a little sharper. Avoid strongly flavored seeded or sweet breads.

Serving Suggestions

Serve the sauce cold or cool, in a small bowl for dipping or spooned over food just before serving. It pairs well with grilled or roasted vegetables such as asparagus, zucchini, peppers, and potatoes, as well as crusty bread, cooked prawns, white fish, chicken, or lamb. For a simple appetizer, set out the sauce with raw vegetables and toasted bread. A few drops of olive oil, chopped parsley, or sliced grapes make an appealing garnish without changing the sauce’s basic character.

For hot dishes, add the sauce at the table rather than cooking it in a pan. Heating can dull the fresh garlic and vinegar and may cause the oil-and-almond emulsion to separate. If serving it alongside seafood or meat, keep the sauce in its own bowl and use clean serving utensils.

Variations

More like ajo blanco soup: Increase the cold water to about 1½ cups (360 ml), then adjust gradually until the mixture is drinkable. Chill thoroughly and serve in bowls or glasses, traditionally with grapes or melon. This is a thinner, soup-like preparation rather than a dip.
Without bread: Omit the bread and its soaking water, and blend in cold water a tablespoon at a time until smooth. The result is less thick and may feel slightly less rounded; a small cooked potato can add body if you want a bread-free sauce.
With a softer garlic flavor: Use half a clove, or briefly blanch the peeled clove in boiling water for 30 seconds and cool it before blending. The garlic will be less sharp.
With another nut: Raw, unsalted cashews can replace the almonds in the same quantity. They make a very creamy sauce with a sweeter, less distinctly almond-like flavor. Avoid salted or roasted nuts, which can make the seasoning and texture unpredictable.

Storage and Reheating

Transfer the sauce to a clean, airtight container and refrigerate it within 2 hours of making. It keeps for up to 3 days in the refrigerator; because it contains fresh garlic and is served chilled, do not leave it at room temperature for more than 2 hours, or 1 hour if the temperature is above 90°F (32°C). Stir well before serving, as a little separation is normal. Add a teaspoon of cold water at a time if it has become too thick.

This sauce is meant to be served cold, so reheating is not recommended. Freezing is also not ideal: thawed almond-and-oil emulsion can separate and become grainy. Make a fresh batch if you need it beyond its refrigerated storage time, and discard it if it has been left out too long or shows an unusual smell or appearance.

Frequently Asked Questions

Is salsa de ajo blanco the same as ajo blanco soup?
Ajo blanco usually refers to a chilled Andalusian almond-and-garlic soup made with bread, water, olive oil, and vinegar. Salsa de ajo blanco uses related ingredients but is blended thicker for dipping or spooning over food. The names and proportions can differ between cooks and regions.

Can I make it without a high-speed blender?
Yes. A standard blender or food processor works, though the sauce may retain a little almond texture. Soaking the almonds in hot water for 20–30 minutes, then draining and cooling them, makes blending easier. Blend in short bursts and scrape down the sides as needed.

Why is my sauce grainy?
The almonds may not have been ground finely enough, or the blender may need more time. Blend longer, pausing to scrape down the bowl. If the mixture is too stiff to circulate, add cold water a teaspoon or tablespoon at a time. Straining through a fine sieve can make it smoother, though it will reduce the yield.

Can I make this sauce ahead?
Yes. Make it up to a day ahead and keep it covered in the refrigerator. It may thicken as it chills, and the garlic flavor can become stronger. Stir it before serving, thin it with a little cold water if needed, and taste again for salt and vinegar.

What can I use instead of sherry vinegar?
Red wine vinegar is the closest easy substitute and gives a slightly sharper result. White wine vinegar also works, though it has a lighter flavor. Start with the stated amount, then add a little more only after tasting; lemon juice can be used, but it makes the sauce brighter and less traditionally rounded.

Can I use roasted almonds?
Raw blanched almonds are best for the mild flavor and pale color associated with this sauce. Unsalted roasted almonds can be blended in, but they give the sauce a toastier taste and a darker color. If the almonds are salted, reduce the added salt and season only after blending.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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