Making Proper Dashi
This is not a soup you cook; it is a base you assemble. The clarity of your dashi determines the depth of every miso soup, simmered vegetable dish, or noodle broth you make afterward.
Temperature control is your only challenge.
The kombu provides glutamic acid and the bonito provides inosinic acid; combining them creates a deep umami that neither can achieve alone. Keep your eyes on the pot so you don't miss the moment the kelp surfaces.
- medium saucepan
- fine-mesh strainer
- cheesecloth or kitchen paper towel
What goes in.
- 4 cupscold water
- 1 piece (4-inch square)dried kombu (kelp)
- 1 cup (packed)katsuobushi (dried bonito flakes)
Stop before the bubble
Remove the kombu just before the water reaches a boil. Boiling the kelp creates a slimy texture and a bitter, muddy flavor that will ruin the delicate balance of the broth.
The method.
Soak the kombu
Wipe the white powder off the kombu with a damp cloth—do not wash it off entirely as it holds flavor. Place it in the water in your saucepan and let it sit for at least 15 minutes.
Heat the kombu
Place the saucepan over medium-low heat. Bring the water slowly toward a simmer. As soon as you see small bubbles forming at the edges, remove the kombu with tongs.
Infuse the bonito
Bring the liquid back to a very gentle shimmer and immediately remove from heat. Add the katsuobushi flakes all at once. Let them steep undisturbed for 3 to 5 minutes until they sink to the bottom of the pot.
Strain
Line your strainer with a cheesecloth or a paper towel. Pour the broth through slowly. Do not press on the flakes, or you will cloud the broth.
Other turns to take.
Kombu Dashi
Used for vegan cooking; skip the bonito flakes entirely and let the kombu soak in cold water overnight in the refrigerator for a cleaner, subtler base.
When it doesn't go to plan.
Keep leftover dashi in the refrigerator for up to three days or freeze it in ice cube trays for quick use.
The used kombu and bonito flakes can be boiled with soy sauce, mirin, and sugar to make a topping for rice called furikake.
Use soft or filtered water if possible; hard water with high mineral content can inhibit the extraction of flavor from the kelp.
The ones that keep coming up.
Why is my dashi cloudy?
Cloudiness usually happens if you boiled the bonito flakes or squeezed them during the straining process. Keep the agitation to an absolute minimum.
Can I use powdered dashi instead?
Instant dashi exists, but it contains added salt and preservatives that shift the final profile of your dish. Making it fresh allows you to control the seasoning entirely.
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