Romesco sauce is one of those condiments that makes everything taste better. Traditionally made with roasted peppers, tomatoes, almonds, and garlic, it’s smoky, nutty, and a little tangy. With an air fryer, you can get those roasty flavors fast—no heating up the oven or babysitting the broiler.

Spoon it over grilled chicken, toss it with roasted veggies, or swirl it onto a grain bowl. It keeps well, tastes even better the next day, and instantly makes a simple meal feel special.

Jump to Recipe Card

Why This Recipe Works

Cooking process: Air-fried, blistered red bell peppers and halved Roma tomato fresh from the basket,

Air fryer roasting adds depth in minutes. The high heat and quick circulation char the peppers and tomatoes just enough to build flavor without drying them out.
Classic ingredients, simplified method. You get the signature romesco profile—smoky, nutty, tangy—using easy pantry staples and minimal prep.
Texture you can control. Blend it silky-smooth for drizzling or keep it a bit chunky for dipping—both work beautifully.
Make-ahead friendly. The flavors meld as it rests, so it tastes even more balanced after a day in the fridge.

Ingredients

2 large red bell peppers, halved and seeded
1 medium Roma tomato, halved
4 cloves garlic, unpeeled
1/3 cup blanched almonds (or Marcona almonds)
1 slice day-old crusty bread (about 1 ounce), torn
2 tablespoons extra-virgin olive oil, plus more as needed
1 tablespoon sherry vinegar (or red wine vinegar)
1 teaspoon smoked paprika
1/4 teaspoon red pepper flakes (optional, for heat)
1/2 teaspoon kosher salt, plus more to taste
Freshly ground black pepper, to taste
Lemon wedge, for finishing (optional)

Instructions

Close-up detail: Blender jar filled with just-blended romesco—silky but slightly textured with tin

Prep the air fryer. Preheat to 400°F (200°C) for 3–5 minutes. Preheating helps blister the peppers and tomato quickly.
Roast the vegetables. Arrange the bell pepper halves (cut side down), tomato halves (cut side up), and whole unpeeled garlic cloves in the basket.
Drizzle lightly with olive oil and a pinch of salt. Air fry for 10–12 minutes, flipping the peppers halfway, until skins are blistered and lightly charred.
Toast the almonds and bread. While the veg roast, place almonds and torn bread on a small sheet of foil. After the vegetables finish, add the foil packet to the basket and air fry at 350°F (175°C) for 2–3 minutes until lightly golden and fragrant.
Watch closely to avoid burning.
Steam and peel. Transfer the hot peppers and tomatoes to a bowl and cover with a plate for 5 minutes. This loosens the skins. Peel the peppers and tomato.
Squeeze the roasted garlic from its skins.
Blend. In a blender or food processor, add peeled peppers, tomato, roasted garlic, toasted almonds, toasted bread, 2 tablespoons olive oil, sherry vinegar, smoked paprika, red pepper flakes (if using), 1/2 teaspoon salt, and a few grinds of pepper. Blend until smooth or slightly coarse, depending on your preference.
Adjust. If the sauce is too thick, blend in a splash of water or more olive oil. Taste and adjust salt, vinegar, and heat.
A squeeze of lemon adds brightness.
Serve. Spoon over grilled meats, roasted vegetables, fish, eggs, or crusty bread. It’s also great as a dip or sandwich spread.

Storage Instructions

Refrigerate: Store in an airtight container for up to 5 days. Press plastic wrap directly onto the surface to minimize oxidation.
Freeze: Portion into small containers or ice cube trays and freeze for up to 2 months.
Thaw overnight in the fridge and stir in a drizzle of olive oil to refresh the texture.
Make ahead: The flavor improves after 12–24 hours, so it’s ideal for prepping before a gathering.

Tasty top view: Overhead shot of a shallow bowl of romesco swirled to show body and shine, finished

Benefits of This Recipe

Weeknight speed: Using the air fryer cuts roasting time and cleanup, making a complex-tasting sauce doable on a busy night.
Versatile and flexible: Works as a dip, sauce, spread, or dressing. It lifts everything from grilled chicken to roasted cauliflower.
Nutrient-dense: Almonds add healthy fats and protein, while peppers and tomatoes bring vitamin C and antioxidants.
Budget-friendly: Uses affordable pantry staples and stretches across multiple meals.

What Not to Do

Don’t skip peeling the peppers and tomato. The charred skins add bitterness and a rough texture.
Don’t over-toast the almonds and bread. Burnt notes will dominate the sauce. Light golden is enough.
Don’t blend it too thin. Romesco should have body.
Add liquid gradually until it’s pourable but still rich.
Don’t forget acid and salt. Without enough vinegar and seasoning, the sauce will taste flat.

Recipe Variations

Hazelnut romesco: Swap almonds for toasted hazelnuts for a deeper, rounder flavor.
Tomato-forward: Add an extra roasted Roma tomato for a saucier, slightly sweeter finish.
Jarred shortcut: Use jarred roasted red peppers to save time. Pat them dry to avoid watering down the sauce.
Gluten-free: Replace the bread with a gluten-free slice or 1–2 tablespoons of almond flour for body.
Smokier version: Add 1–2 teaspoons of the oil from a jar of smoked paprika or blend in a small piece of rehydrated dried ancho chile.
Herb boost: Blend in a handful of parsley or basil for freshness and color.
Spicy kick: Increase red pepper flakes or add a roasted jalapeño to the basket with the peppers.

FAQ

Can I make romesco without nuts?

Yes. Use sunflower seeds or pumpkin seeds instead of almonds, and add an extra tablespoon of olive oil if needed.

The texture will be slightly different, but still delicious.

Do I have to use sherry vinegar?

No. Red wine vinegar works well, and apple cider vinegar can also do the job. Start with less and add to taste—sherry vinegar has a softer profile.

How do I fix a bitter or harsh sauce?

Balance it with a pinch of sugar or a drizzle of honey, plus a little more olive oil.

Often, more salt and a splash of vinegar bring everything into focus.

What if my sauce is too thick?

Blend in a tablespoon of water or olive oil at a time until it’s your ideal consistency. Avoid adding too much at once to keep the flavor concentrated.

Can I roast everything at once in the air fryer?

Yes, but give the peppers and tomato priority space since they take longer. Add the almonds and bread at the end for a brief toast so they don’t burn.

Is romesco served hot or cold?

Either works.

It’s commonly served at room temperature, which lets the flavors shine, but it’s also great slightly warmed for drizzling.

What do I serve it with?

Try grilled shrimp, roasted potatoes, seared steak, sautéed greens, roasted cauliflower, omelets, or as a spread for sandwiches and wraps. It’s incredibly versatile.

Can I use canned tomatoes?

If fresh tomatoes are out of season, use a few drained canned whole tomatoes and briefly air fry them to concentrate their flavor. Pat them dry before blending.

How long does it keep its color?

Romesco can darken slightly over a few days.

To slow this, press plastic wrap on the surface and store in a sealed container. A quick stir before serving helps.

Can I double the recipe?

Absolutely. Roast in batches so the air fryer isn’t overcrowded, which ensures proper blistering and better flavor.

Final Thoughts

This air fryer romesco sauce packs big flavor with little effort.

It’s the kind of recipe that earns a permanent spot in your rotation because it transforms simple ingredients into something memorable. Make a batch on Sunday, keep it in the fridge, and you’ll have a ready-made upgrade for dinners all week. Once you taste how vibrant and versatile it is, you’ll wonder how you cooked without it.