Sugar kelp – Identification, Edibility, Distribution

Saccharina latissima 

aka: Poor man’s weatherglass, Sea belt Sweet kombu, Sugar tang

Sugar kelp drying for scottish dashi

Sugar kelp drying for scottish dashi

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Habitat: Starting from the mean low tide mark downwards, attached to rock, boulders and large stones, often in gullies.

Seaweed distribution by tidal range Click image to enlarge ©

Seaweed distribution by tidal range
Click image to enlarge

Identification: Very distinctive elongated crenulated ribbons, reminiscent of a long, frilly feather boa. Up to 4m in length with a short, narrow cord and holdfast at the base.

Ecology: Sugar kelp takes 2 to 4 years to reach full size, becoming fertile between 8 to 15 months. Like other large kelps , it provides important food and habitat for other marine algae and creatures as well as sequestering carbon and reducing coastal erosion.

Sugar Kelp Crisp

Edible Uses: Sugar kelp is closely related to Saccharina japonica, the (farmed) seaweed basis of nearly all Japanese dashi, and can be used in similar ways – adding umami to soups, stews and stocks. However, dried dulse and laver exude more glutamates by weight than sugar kelp (read an in-depth study into this here). As they are better eating as vegetables too, I recommend using them in soups and stews, though there is no harm in adding sugar kelp to the pot in the same way as you might add bay leaves. It contains mannitol, a naturally occurring sugar that will add sweetness. Deep fried sugar kelp make excellent crisps, though I recommend a least partially drying it first to avoid dangerous fat-spitting! Younger, thinner fronds make great fat-free crisps – just fully dehydrate and lightly toast in the oven or a dry frying pan before serving. If you sprinkle them with seasoning prior to dehydration, they go to the next level. I like a combination of dehydrated fermented wild garlic, powdered dehydrated cep or smoked hen of the woods, and powdered dehydrated pepper dulse (yup – seasoning a seaweed crisp with another seaweed – its the future man!)

Fat free sugar kelp crisps with wild seasonings

Sustainable Harvesting: Spring to Autumn, cutting no more than 1/3rd from each frond and moving your harvesting around as well as rotating harvesting locations from year to year.

Sugar kelp

Sugar kelp

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1 Comment

  • Kurichan says:

    i have some of this dried, and have been amazed at the wonderful umami fragrance, that I felt exceeded the quality, Japanese konbu that we have. I think our Japanese konbu is wild harvested off the coast of Hokkaido and not farmed, but I may be wrong. I have been confused, calling this species sugar kelp and oar weed, I mean it’s shaped like an oar! So great to be better informed, and so interesting to know that this is the kelp most closely related to Japanese konbu.

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