Gochujang vs Peperoncino: Two Chili Traditions, One Flavor Language

Italian cooking has had dried chili pepper (peperoncino) since the 16th century, when capsicums arrived from the Americas via Spanish trade routes. Korean cooking has gochugaru (dried chili flakes) and gochujang (fermented chili paste) in the same general timeframe — the capsicum arrived on the Korean peninsula through trade and warfare around the same era.

Two peninsulas. Two cuisines. Two chili traditions that developed independently over 400 years. They do not taste the same. But they solve the same problems the same way, and understanding the parallel makes both traditions more legible.

Peperoncino: Italian chili logic

Italian dried chili (peperoncino, often Calabrian chili in the US market) is used in Italian cooking primarily as a background heat element rather than a foreground flavor. It is bloomed in olive oil, usually with garlic, as the opening move in a sauce — a technique called soffritto or simply olio rosso. The capsaicin compounds are oil-soluble and bloom when heated in fat, dispersing heat evenly through the dish.

The varieties range from mild (the sweet cherry-red peperoni di Senise) to moderately hot (standard peperoncino rosso) to fiery (Calabrian chili paste, which is crushed chili in oil and vinegar). Each variety carries a different heat and aromatic signature.

What peperoncino does not do: it does not add fermented depth. It adds heat, mild fruit aromatics, and a redness that comes from the carotenoid compounds in the pepper.

Gochujang: Korean chili logic

Gochujang (고추장) is a different instrument. It is fermented chili paste — the base is glutinous rice, meju (fermented soybean brick), and gochugaru (coarsely ground dried chili), salt-fermented for months to years. The fermentation transforms the paste from a simple chili condiment into something structurally similar to a dark miso: complex, deeply savory, with significant glutamate content from the soybean fermentation alongside the capsaicin heat from the chili.

This is the key distinction: gochujang is a fermented umami carrier that also happens to be hot. Peperoncino is a heat carrier that does not carry umami.

Gochugaru (the dried chili flake form, without the fermentation) is closer to peperoncino in function — heat and color, without the fermented depth.

What happens when they meet

The Korean-Italian crossover works best when you understand what each ingredient is providing:

Gochujang + olive oil + garlic as a pasta sauce base: the gochujang provides heat (capsaicin), sweet depth (from the glutinous rice in the paste), fermented savory complexity (soybean fermentation), and red color. The olive oil blooms the oil-soluble heat compounds exactly as it does with peperoncino. The result is a pasta sauce that reads as Italian in structure (oil-based, garlic-forward, pasta water emulsified) but arrives at a Korean flavor register.

This is not a novelty. It's the functional logic applied: you identified what peperoncino does (heat + aromatics in oil), found the Korean ingredient that does the same plus more (gochujang: heat + aromatics + fermented depth), and swapped it into the Italian cooking method.

Peperoncino in Korean braises: The reverse works equally well. A tablespoon of Calabrian chili paste in a doenjang (fermented soybean paste) braise adds Italian-style fruity heat to a Korean flavor base. The result is still recognizably Korean in structure but warmer and more aromatic in finish.

The substitution table

| Dish | Uses | Could use instead | |---|---|---| | Pasta all'arrabbiata | Peperoncino in oil | Gochujang (adds fermented depth + sweet) | | Cacio e pepe | Coarsely cracked black pepper | Sansho pepper or togarashi (aromatic) | | Spaghetti aglio e olio | Peperoncino + garlic | Gochugaru + garlic + ginger (shift to Korean register) | | Gochujang dipping sauce | Gochujang + sesame + vinegar | Calabrian chili paste + Pecorino + red wine vinegar (Italian register) | | Kimchi (topping) | Gochugaru | Peperoncino in oil + salt + garlic (rough approximation) | | Nduja (spreadable Calabrian salami) | Fatty, spicy, spreadable chili | Mentaiko butter (spicy fish roe compound butter) |

The dish in Seoul Meets Mexico City

The Kimchi Quesadilla in Seoul Meets Mexico City (Vol. 2) uses gochujang as part of the crema — sour cream + gochujang + sesame oil + lime. This is structurally identical to a Calabrian chili crema (sour cream + peperoncino paste + olive oil + lemon). Same format. Different chili. The function is identical: creamy, tangy, heat-forward condiment for a crispy-fried tortilla delivery vehicle.

The Gochujang Braised Short Rib Taco on this site follows the same logic in reverse: a Korean braising liquid (gochujang + soy + sesame) applied to a Mexican delivery format (corn tortilla, pickled radish, cilantro). The technique comes from Korean galbi-jjim. The format comes from Sonoran taquería tradition. Neither fights the other because neither is performing the other's role.

A note on heat level

Italian peperoncino heat varies enormously by variety. As a rule: Southern Italian cooking (Calabria, Basilicata, Sicily) uses significantly more chili than Northern Italian cooking. The heat in a proper Calabrian pasta all'arrabbiata is genuine.

Gochujang also varies by brand and production. Mild gochujang (especially the sweeter versions marked "less spicy") performs more like a sweet chili paste; traditional spicy gochujang is hot enough that a tablespoon in a pasta sauce registers clearly.

When substituting: start with half the called-for quantity of either ingredient and adjust. Both are easier to add than to subtract.

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The Kimchi Quesadilla and Gochujang Braised Short Rib Taco are free on this site. Both books in the Borderless Kitchen series — Tokyo Meets Tuscany and the forthcoming Seoul Meets Mexico City — are available on Amazon.