Gejang-guk

A warming soup built on the rich, briny liquid from fermented gejang crab, combined with tofu and spring onion.

Gejang-guk is the thrifty, deeply flavourful soup that Korean cooks make from the marinade and residual liquid of gejang — raw crabs fermented in either soy sauce (ganjang gejang) or a spiced red paste (yangnyeom gejang). Rather than discarding the intensely savoury, crab-infused liquid after the gejang is eaten, resourceful cooks dilute it with anchovy stock or plain water, add tofu, spring onion, and sometimes bean sprouts, and simmer it into a soup with a flavour profile entirely its own — briny, slightly sweet from the crab, and deeply umami. It is the kind of zero-waste cooking that defines traditional Korean cuisine, and the soup's existence is a testament to how seriously Koreans take the idea of letting nothing go to waste. The flavour is assertive and oceanic — Koreans describe it as 'the taste of the sea in a bowl' — and it pairs perfectly with plain rice. Gejang-guk is not commonly found on restaurant menus but is treasured as a home dish, particularly in coastal regions of South Jeolla and Chungnam where crab farming and fishing are part of daily life.