Natural form

Fresh Gernika peppers as harvested: slender, light-green, and tender.

Shows the raw ingredient in its recognizable whole form so readers can identify it at a market or shop.

Produce

Gernika Pepper

Slender Basque green pepper, fried whole in olive oil for a mild, occasionally spicy tapa.

Gernika peppers are slim, light-green peppers from the Basque Country, traditionally fried whole in olive oil and sprinkled with coarse salt. Most are mild and sweet, though the odd one carries a surprising kick, making them a beloved tapa similar to padrón peppers. They are picked young and tender for the best frying texture.

The Gernika pepper is the defining frying pepper of Basque Country cuisine — a slender, thin-walled Capsicum annuum variety grown in the region around the town of Gernika (Gernika-Lumo) in Bizkaia province. Unlike the thick-walled bell peppers found in most kitchens, this pepper is built for high, dry heat: its thin flesh blisters and caramelizes in minutes, turning tender and slightly sweet with a gentle, vegetal bitterness that cuts through the oil. The pepper is most famously fried whole in abundant olive oil until blistered and soft, then finished with a drizzle of the cooking oil and coarse salt — a tapa called piparrak in Basque. What makes the Gernika distinctive is its variability: peppers from the same plant can range from nearly heatless to moderately spicy (500–2,500 SHU), a characteristic that experienced Basque cooks account for by tasting one or two before preparing a batch. The Eusko Label certification protects authentic Piparra de Gernika, guaranteeing traditional small-plot cultivation and varietal purity. Beyond the iconic fried preparation, these peppers appear in piperade stews, are pickled in vinegar for bar snacks, and slice raw into salads for a clean, bright crunch. In Basque cooking, the Gernika pepper is not an afterthought — it is a cornerstone of the region's identity on the plate.

Measured in: piece
Storage: Fridge

Types & varieties

Piparra de Gernika (Eusko Label)

The canonical variety from Bizkaia province; Eusko Label certification ensures traditional small-plot cultivation and varietal purity; sold fresh at market in summer

Guindilla de La Rioja

Essentially the same pepper variety under a different regional name; elongated, thin-fleshed; widely used throughout La Rioja for frying and pickling

Guindilla alavesa

From Álava province; identical characteristics to the Bizkaia variety; most commonly found pickled in vinegar at bars and markets

Why Heat Varies on the Same Plant

This inconsistency puzzles first-time cooks, but it is completely normal for this variety. The genetic expression of capsaicin (the compound that creates heat) fluctuates based on where the pepper develops on the plant, how much sun it receives, and soil conditions. Peppers from the sunny outer branches tend to be hotter; those sheltered in the interior are often mild. Always taste the first pepper from any batch raw (or after a quick blistering) before seasoning the entire serving — if it has kick, you may want to reduce the salt or serve with a dairy side like Idiazábal to balance the heat.

Cut a tiny piece from the stem end of one pepper, taste raw — adjust seasoning accordingly
If the first pepper is mild, the batch will likely be mild; if it's spicy, the others probably are too
Do not rely on appearance: green color tells you nothing about heat level in this variety

The Oil Is Part of the Dish

In Basque taverns, the olive oil used for frying is considered an ingredient, not just a cooking medium. After the peppers are drained, the oil — now infused with their grassy, slightly spicy essence — is drizzled back over them. Some cooks add a sliced garlic clove to the oil during frying to perfume it. Never discard this oil; sop it up with bread, use it to finish a grilled steak, or drizzle it over a fried egg.

Use a decent extra-virgin olive oil — you will taste it
Add a smashed garlic clove to the oil for the last 2 minutes of frying
Reserve leftover oil for dressing grilled meats or vegetables

Common uses

Classic fried tapa: fried whole in olive oil, drained, drizzled with oil, finished with coarse sea saltPiperade: the Basque stew of tomatoes, onions, garlic, and these peppers, served with eggs or meatPickled in sherry vinegar as a bar snack or sandwich condimentIn Basque potato salad for a subtle heat and vegetal contrastWith grilled txuleta (Basque rib steak) as a traditional sideSliced raw into summer salads for crunch and occasional mild heatStuffed with mild cheese or anchovy paste, then battered and friedAs pizza topping in Basque-influenced cooking

Tips & pitfalls

Prick each pepper 2–3 times with a fork near the stem end before frying to prevent oil splatter from trapped moisture
Heat olive oil in a heavy skillet (cast iron is ideal) to 180°C (350°F) before adding peppers; test with a flick of water — it should sizzle immediately
Fry in batches without crowding the pan; overlapping peppers drops the oil temperature and causes steaming instead of blistering
Turn peppers occasionally with tongs; total cooking time is 8–12 minutes until the skin is blistered and charred in spots and the flesh feels soft when pressed
Do not salt the peppers before frying — salt draws out moisture and prevents proper blistering; salt only after they are drained
For softer, more collapsed peppers, cover the pan for the last 2 minutes to steam them gently
If buying pickled guindillas, taste for firmness — they should have some bite, not be mushy from over-brining
When roasting these peppers, the charred skin is desirable and traditional; do not try to peel Gernika peppers for frying — the blistered skin is the point

Nutrition

20kcal

Energy

84 kJ · per 100 g

Where the calories come from

Protein 15%Carbs 79%Fat 7%

Protein

0.9g

2% DV

Carbs

4.6g

2% DV

Fat

0.2g

0% DV

Fiber

1.7g

6% DV

Sugars

2.4g

of which

Sodium

3mg

0% DV

Notable micronutrients

Vitamin C89% DV

Vitamin B613% DV

Vitamin K6% DV

Thiamin (B1)5% DV

Potassium4% DV

Niacin (B3)3% DV

Source · USDA FoodData Central · Peppers, sweet, green, raw

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In the shops

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Good to know

Origin: Basque Country, Spain (town of Gernika, Bizkaia province)
Botanical Name: Capsicum annuum
Type: Thin-walled frying pepper, elongated and slender
Scoville Range: 500–2,500 SHU (heat varies significantly even on same plant)
Season: June through September (peak summer)
Primary Preparation: Fried whole in olive oil until blistered and tender
Traditional Serving: Fried whole, drizzled with oil, sprinkled with coarse sea salt
Storage: Refrigerate in a paper bag up to 1 week; best used the day of purchase

Substitutes

Shishito peppers — Japanese frying pepper; similar thin walls and mild, occasionally spicy flavor; best blistered in dry or oily heat; slightly shorter than Gernika but interchangeable in most preparations
Padrón peppers — Galician frying pepper; comparable size, thin flesh, and mild-to-spicy variability; the traditional Galician preparation (blistered in oil and sea salt) is nearly identical to the Basque method
Guindilla de La Rioja — Same pepper variety under a different regional name; sold fresh in La Rioja and increasingly available at Spanish specialty grocers; completely interchangeable in any recipe
Friggitello (Italian pepperoncino) — Small Italian frying pepper; similar texture and mild heat profile; useful substitute in the United States where Basque peppers may be unavailable; also excellent pickled

Pairs with

Extra-virgin olive oil Coarse sea salt GarlicAnchoviesIdiazábal cheeseTxuleta (Basque rib steak)Bread Egg

Also called

Gernika Green Pepper · Pimiento de Gernika