Konbu

Store in an airtight container in a cool, dry, dark place. Properly stored dried konbu can last for a very long time, though its flavor may gradually diminish.

Gently wipe the konbu with a damp cloth to remove any sand or debris; avoid washing it, as this can remove the natural glutamate that gives it its umami flavor.

To make dashi, simmer a piece of konbu (often with kombu's white powder intact) in water for about 10-20 minutes on low heat, but do not boil, as this can make the broth bitter.

After making dashi, the rehydrated konbu can be sliced thinly and used in salads, simmered dishes, or pickled.

Dashi

Miso soup

Ramen broth

Simmered dishes (nimono)

Rice dishes

Tofu

Washing the konbu thoroughly, which removes its natural umami-boosting compounds.

Boiling konbu when making dashi, which can result in a bitter flavor and slimy texture.

Overcrowding the pot with too much konbu for the amount of water, leading to an overly intense flavor.