Sunchang, a small county in North Jeolla, is so tied to gochujang that it holds a jang festival every October, but the paste itself is traditionally made in the cold weeks of late winter, when there are no flies and it can ferment slowly in glazed onggi jars on the sunny jangdokdae terrace. Glutinous rice flour is broken down by barley malt into a sweet, runny porridge, boiled down, then beaten with fine chilli powder, fermented soybean (meju) powder, rice syrup and salt. Young, it is bright, sweet and fiery; after two or three months it darkens to brick red and gains a round, savoury depth, thick enough to hold a ridge on the spoon. It goes into bibimbap, tteokbokki, ssamjang, stews and marinades all year. Common mistake: adding the chilli and salt while the porridge is still hot, which dulls the colour and can make the paste turn sour; wait until it is lukewarm. It is ready when it is glossy, deep red, and smells sweet and earthy with no sharp, boozy note. Chef's tip: hold the malt and rice at 55–60 °C on a rice cooker's keep-warm setting; any hotter and the malt enzymes stop working, so the porridge never thins.