By Jayson Byles, forager & chef · Updated August 2026
Laver (Porphyra species) is the wild Atlantic cousin of Japanese nori: sheets of silky, translucent purple-brown membrane, one cell thick, clinging to exposed rock like wet silk. It is one of the most nutritious seaweeds on the shore and the foundation of the oldest seaweed dish in Britain — Welsh laverbread — yet on Scottish rocks it goes mostly unpicked.
How do you identify laver?
Look on exposed, often sand-scoured rock around the middle shore for thin, irregular sheets that shift from olive-brown to deep purple, drying almost black. The texture settles it: laver is silk where sea lettuce is paper — and its green cousin it cannot be confused with, since sea lettuce is unmistakably green. Wet laver stretches slightly between the fingers; nothing else on the rock feels like it.
Where and when to find it
Its favourite ground is rock that takes the sea’s full energy — boulder fields and scoured faces — from mid shore down. It handles exposure astonishingly well and is at its best in the cooler months, autumn through spring, when many greens have retreated.
How do you cook laver?
Choose your tradition. The Welsh way: wash it thoroughly (it hides sand with commitment), then simmer long and slow — hours, not minutes — until it collapses into laverbread, the dark savoury purée classically rolled in oats and fried alongside bacon. The Japanese way: dry the sheets, then toast briefly over heat until they flush green-gold and turn brittle — crumble the result over rice, eggs, fish or butter for instant nori-grade umami. Either way it repays the effort with one of the deepest flavours the shore holds.