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Traditional Spanish Romesco Sauce

Name: Traditional Spanish Romesco Sauce
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 6 servings
Cuisine: Spanish, Catalan
Ingredients: 2 dried ñora peppers; 3 medium ripe tomatoes; 1 whole head garlic; 1 tablespoon extra-virgin olive oil, for roasting; 1 slice rustic white bread, toasted; 2 tablespoons (15 g) toasted almonds, preferably peeled; 2 tablespoons (15 g) toasted hazelnuts, preferably peeled; 1 cup plus 3 tablespoons (250 g) extra-virgin olive oil; 6 tablespoons plus 2 teaspoons (100 ml) wine vinegar; 1 teaspoon sweet Spanish paprika; 1 small dried Spanish chile, or a pinch of red pepper flakes; 1/2 teaspoon fine salt, plus more to taste

A bold Catalan sauce made with roasted tomatoes and garlic, dried ñora peppers, toasted almonds, hazelnuts, bread, and olive oil.

Prep15 min

Cook25 min

Total40 min

Serves6 servings

Jump to Recipe

Romesco is a traditional Catalan sauce that combines roasted tomatoes and garlic with dried peppers, toasted nuts, bread, olive oil, and vinegar. The result is rich, slightly smoky, gently tangy, and substantial enough to cling to grilled vegetables, seafood, and meat.

Although romesco recipes vary throughout Catalonia, the essential character comes from balancing the sweetness of roasted vegetables with the texture of almonds and hazelnuts. Preparing the sauce ahead of time allows the flavors to blend and makes it an especially convenient accompaniment for entertaining.

Why You’ll Love This Recipe

Roasted tomatoes and garlic give the sauce a deep, naturally sweet flavor.
Toasted almonds and hazelnuts create a rich texture without using dairy.
Ñora peppers add the distinctive fruity flavor associated with traditional Catalan romesco.
The sauce can be prepared ahead and served with vegetables, seafood, meat, or bread.
Its thickness and acidity are easy to adjust according to how it will be served.

Ingredient Notes

Ñora peppers

These small Spanish dried peppers are mild, sweet, and slightly fruity. Soaking softens the flesh so it can be scraped from the tough skin. A dried ancho chile is the most practical widely available US substitute.

Tomatoes

Use ripe, flavorful tomatoes because they form the base of the sauce. Roasting concentrates their sweetness and removes excess moisture.

Almonds and hazelnuts

A combination of toasted almonds and hazelnuts gives romesco its characteristic nutty flavor. Peeled nuts produce a lighter color and smoother texture.

Rustic bread

Toasted bread thickens the sauce and helps absorb the olive oil and vinegar. Use a sturdy white country-style bread rather than soft sandwich bread.

Wine vinegar

Red or white wine vinegar may be used. Add it gradually if you prefer a gentler sauce, as the full traditional quantity creates a pronounced tang.

Spanish paprika

Sweet Spanish paprika reinforces the pepper flavor without making the sauce hot. Smoked paprika may be used for a smokier variation, but the flavor will be less delicate.

Expert Tips

Roast the garlic only until soft and lightly golden, since burned garlic will make the entire sauce bitter.
Scrape only the softened flesh from the ñora peppers and discard the tough skins, stems, and seeds.
Toast the bread and nuts before blending to intensify their flavor and prevent the sauce from tasting flat.
Add the olive oil slowly while blending so the sauce emulsifies instead of becoming greasy.
For a rustic romesco, stop blending while a little texture remains. For a smoother sauce, blend longer and add a small amount of water if necessary.
Taste the sauce after it has rested because the vinegar, garlic, and chile become more noticeable over time.

Serving Suggestions

Serve romesco with grilled or roasted vegetables, especially calçots, asparagus, eggplant, zucchini, bell peppers, or onions.

Spoon it alongside grilled fish, shrimp, octopus, chicken, pork, or lamb.

Use it as a spread for toasted bread, sandwiches, or Spanish-style appetizers.

Thin the sauce with a little olive oil or water to create a dressing for roasted potatoes, grain bowls, or sturdy green salads.

Storage and Reheating

Store romesco sauce in an airtight glass container in the refrigerator for up to 5 days. Covering the surface with a thin layer of olive oil can help protect its flavor and color. The sauce may also be frozen for up to 2 months; thaw it overnight in the refrigerator and stir or blend it again before serving. Romesco is usually served at room temperature or slightly chilled and does not require reheating.

Frequently Asked Questions

What can I substitute for ñora peppers?

Use 1 large dried ancho chile for the 2 ñora peppers. Soak it until soft and remove the stem and seeds before blending. The sauce will be slightly darker and smokier but will retain a mild, fruity pepper flavor.

Can I make romesco sauce without hazelnuts?

Yes. Replace the hazelnuts with an equal weight of additional toasted almonds. The sauce will still be rich and traditional in character, although it will have a simpler nut flavor.

Why is my romesco sauce too thick?

Blend in a small amount of water, olive oil, or additional roasted tomato until the sauce reaches the desired consistency. Add liquid one tablespoon at a time to avoid making it too thin.

Does romesco sauce need to be served cold?

No. Romesco can be served chilled, at room temperature, or gently warmed. Room temperature usually provides the fullest flavor and the best texture.

CuisineSpanish, Catalan CourseSauce, Condiment Yield6 servings NutritionApprox. 430 calories per serving

Ingredients

2 dried ñora peppers
3 medium ripe tomatoes
1 whole head garlic
1 tablespoon extra-virgin olive oil, for roasting
1 slice rustic white bread, toasted
2 tablespoons (15 g) toasted almonds, preferably peeled
2 tablespoons (15 g) toasted hazelnuts, preferably peeled
1 cup plus 3 tablespoons (250 g) extra-virgin olive oil
6 tablespoons plus 2 teaspoons (100 ml) wine vinegar
1 teaspoon sweet Spanish paprika
1 small dried Spanish chile, or a pinch of red pepper flakes
1/2 teaspoon fine salt, plus more to taste

Instructions

Place the dried ñora peppers in a bowl, cover them with warm water, and soak for at least 4 hours or overnight.
Preheat the oven to 400°F (200°C). Cut a shallow cross in the bottom of each tomato and trim the top from the head of garlic to expose the cloves.
Place the tomatoes and garlic in a baking dish, drizzle them with 1 tablespoon of olive oil, and roast until softened. Begin checking the garlic after 15 minutes and the tomatoes after 20 minutes.
Let the roasted tomatoes and garlic cool enough to handle. Peel the tomatoes and squeeze the softened garlic cloves from their skins.
Drain the ñora peppers, remove the stems and seeds, and scrape the softened flesh away from the skins with a small spoon.
Place the roasted tomatoes, roasted garlic, ñora flesh, toasted bread, almonds, hazelnuts, paprika, dried chile, salt, and vinegar in a blender or food processor.
Blend until the ingredients form a coarse paste, scraping down the sides of the container as needed.
With the machine running at medium speed, gradually pour in the olive oil and continue blending until the sauce is thick, emulsified, and mostly smooth.
Taste the sauce and adjust the salt, vinegar, chile, or olive oil until it has a balanced nutty flavor with gentle acidity and mild heat.
Transfer the romesco sauce to a covered container and refrigerate it for at least 30 minutes before serving so the flavors can develop.

Notes

The soaking time for the ñora peppers is not included in the preparation time.

Ñora peppers are small, round Spanish dried peppers with a sweet, fruity flavor. When they are difficult to find, use 1 large dried ancho chile as a practical US alternative, understanding that it will produce a slightly darker and smokier sauce.

Use plain rustic bread without seeds or added dairy when the listed dairy-free, egg-free, soy-free, and sesame-free classifications are required.

The amount of vinegar may be reduced for a milder sauce. Begin with 1/4 cup, blend, and add more gradually to taste.

The calorie estimate assumes the entire quantity of olive oil is incorporated into the sauce and the complete batch is divided into 6 servings.

The free-from categories describe the written recipe only. Check bread, paprika, dried chile, vinegar, and packaged nut labels when strict dietary verification is necessary.