Raw blue crabs marinated in a deeply seasoned, repeatedly boiled-and-cooled soy sauce until the flesh turns silky and translucent and the roe sets like custard. Intensely savory and sweet, it is famously called a 'rice thief' for how much rice it makes you eat.
A variety of jeotgal (salted, fermented seafood) that surged in popularity in South Korea from the 1990s and gained international fame, notably in Japan; documented in Korea.
The flesh is cool, glossy and almost gelatinous, sliding from the shell with a sweet brininess steeped in garlicky soy. The roe is the prize: rich, creamy and ocean-deep, it begs to be scraped over warm rice in the half-shell.
The high-salt soy brine draws out water and denatures the crab proteins, 'curing' the raw flesh to a firm, translucent set without heat. Re-boiling the marinade kills surface microbes and concentrates flavor so it penetrates deeper on each cycle.
Variations
Yangnyeom-gejang (spicy chili-marinated version), gejang made with snow crab, versions with added sweetness from fruit, smaller crab varieties for snacking.
On the Palate
Where Ganjang Gejang sits in the Korean flavor cloud
Ingredients
Serves 4
How it's made
8 steps · 40 min
- 120 min
Scrub fresh raw blue crabs clean and drain them well.
- 220 min
Simmer soy sauce with kelp, onion, garlic, ginger and chili to infuse it.
- 330 min
Cool the seasoned soy sauce completely.
Watch outCool the seasoned soy sauce completely before it touches the crab — pour it on warm and you start cooking the raw flesh instead of curing it.
- 46 min
Arrange the crabs in a sealable container, shell-side down.
- 53 min
Pour the cooled soy sauce over to fully submerge the crabs.
- 61440 min
Refrigerate for a day so the brine penetrates the flesh.
Watch outAfter a day the flesh should turn firm and translucent — that jelly-like set means the brine has cured it through; watery, opaque meat needs longer.
- 715 min
Drain off the soy sauce, re-boil it, cool it again and pour back over.
Watch outRe-boil the drained marinade, then cool it fully again before pouring back — boiling kills surface microbes and lets it soak deeper each round; pouring it back hot would cook the crab.
- 81440 min
Marinate one more day, then cut and serve cold with hot rice.
