Gochujang

Gochujang (고추장) is the Korean fermented red chili paste — distinct from both Chinese chili pastes and Western hot sauces in being a deliberately-fermented multi-ingredient preparation rather than a simple chili-and-salt grind. The basic formula: coarse Korean red pepper flakes (gochugaru), cooked glutinous rice (which is fermented into a sweet base by enzymes), powdered meju (the same fermented soybean brick used for doenjang), malt syrup or barley malt powder (for additional enzyme activity), and salt. The mixture is combined, packed into a traditional onggi crock, and fermented for several months to a year.

The technical structure is unusual: gochujang involves multiple simultaneous fermentations. The glutinous rice provides starch that is converted to sugar by amylase enzymes (from the malt and meju powder). The meju powder also contributes proteases that break down protein. The chili paste base ferments slowly with lactic acid bacteria from the gochugaru, while the fermentation environment selects for halophilic and acidophilic organisms. The result, after months of aging, is a complex paste that is simultaneously sweet (from rice-derived sugars), umami (from meju-derived amino acids), spicy (from the chili), and lactic-tangy (from the slow lactic fermentation). No other chili paste in the world has gochujang's particular balance.

Gochujang's role in Korean cooking is foundational and broad: it is the base of bibimbap sauce, tteokbokki (rice cake stew), gochujang chigae, marinade bases for bulgogi and galbi, and the dipping sauce chogochujang (gochujang + vinegar + sugar + sesame). Korean traditional gochujang production is annual: the paste is made at the end of winter (in jangdam season, when the cold preserves the fresh-mixed paste) and consumed throughout the following year.

Modern industrial gochujang is fermented for shorter periods (8-12 weeks rather than 6-12 months) and often uses cornstarch in place of glutinous rice for cost reasons. The product is broadly similar but lacks the depth of traditional preparation. The 'traditional' artisanal gochujang produced in Sunchang (Jeolla Province), Korea — the most famous gochujang-producing region — is a designated geographical-indication product with continuous-tradition producers.