gochugaru

Gochugaru is the Korean term for chili pepper flakes or powder, the backbone of kimchi, gochujang, and most red-colored Korean dishes. The word breaks into gochu (고추, chili pepper) and garu (가루, powder or flour), making the compound transparently chili powder. The gochu element has a debated etymology: one theory traces it to the Sino-Korean compound for bitter pepper, parallel to the Chinese hujiao (胡椒, black pepper); another connects it to a phonetic loan through Japanese from a regional provenance name. Both theories remain unresolved in Korean linguistic scholarship.

The capsicum plant that gochu names is Capsicum annuum, native to Mexico and Central America and domesticated at least 6,000 years ago. It reached Korea through a documented route: Portuguese traders brought capsicum to Japan via Goa by the 1540s, and Japanese forces carried pepper seeds into Korea during the Imjin War invasions of 1592 to 1598. The 1613 herbal compendium Dongui Bogam by royal physician Heo Jun calls the pepper waegatsu, meaning Japanese mustard, recording that Korean speakers understood it as a foreign import. Within one century, Korean cuisine had incorporated capsicum so deeply that it became definitional.

The garu component places gochugaru in a specific form category. Korean cooks distinguish between fine gochugaru, used in pastes and marinades, and coarse gochugaru, preferred for kimchi fermentation because larger flakes ferment more slowly and leave visible red color in the finished product. The drying method also matters: sun-dried peppers produce a sweeter, slightly smoky powder, while mechanically dried peppers are more consistent but flatter in taste. The Cheongyang chili variety, grown in South Chungcheong Province, yields a much hotter gochugaru than the milder Daegwallyeong variety from Gangwon Province.

Global demand for gochugaru increased sharply after 2010, driven by the international spread of Korean barbecue restaurants and interest in kimchi as a fermented food. David Chang used gochugaru explicitly in published recipes from his Momofuku restaurant group, and by 2015 the ingredient was stocked in specialty food retailers across North America and Europe. The word entered English-language cookbooks untranslated, reflecting an editorial judgment that generic chili flakes are not equivalent. That judgment is correct: gochugaru has a specific heat range of approximately 3,000 to 8,000 Scoville units and a distinct fruity sweetness that generic flakes lack.