Making Basic Dashi
Dashi is the foundation of Japanese cooking, built by extracting umami from kombu (dried kelp) and katsuobushi (dried bonito flakes) through a gentle simmer and steep. It requires only three ingredients and twenty minutes to yield a clear, golden broth that anchors soups, noodle broths, and simmered dishes.
Patience is your primary ingredient.
Do not boil the kombu, as it releases bitterness and makes the broth cloudy. Keep your movements gentle when straining to preserve the clarity of the liquid.
- medium saucepan
- fine-mesh strainer
- cheesecloth or paper towel
What goes in.
- 4 cupswater
- 1 piece (4-inch)dried kombu
- 1.5 cupskatsuobushi (bonito flakes)
Respect the simmer
Kombu releases its best qualities just before the water reaches a boil. Pull it out the moment tiny bubbles form at the base of the pot.
The method.
Soak the kombu
Place the water and kombu in the saucepan. Let it sit for 15 minutes to hydrate the kelp.
Heat gently
Set the pot over medium-low heat. Watch for small bubbles appearing around the edges of the kombu. Remove the kombu immediately once you see them.
Add bonito
Bring the water to a soft simmer, then turn off the heat. Add the katsuobushi and let it steep for 3 to 5 minutes until the flakes sink to the bottom.
Strain
Line your strainer with cheesecloth or a paper towel. Pour the broth through slowly without pressing on the flakes, which ensures the dashi remains clear.
Other turns to take.
Kombu Dashi
Omit the bonito flakes entirely for a vegan base; leave the kombu in the water for several hours or overnight in the fridge.
Niban Dashi (Second Brew)
Reuse the used kombu and flakes by simmering them in 2 cups of fresh water for 10 minutes to extract a stronger, earthier base for stews.
When it doesn't go to plan.
Wipe the kombu with a damp cloth to remove grit, but leave the white powdery substance, as it contains much of the umami.
Store finished dashi in the refrigerator for up to three days or freeze it in ice cube trays for quick additions to sauces.
The quality of your water matters; use filtered water if your tap water has a strong mineral or chlorine taste.
The ones that keep coming up.
Can I use powdered dashi instead?
Powdered versions are convenient, but they lack the delicate, clean aromatics of a fresh extraction.
Why is my dashi cloudy?
Cloudiness usually happens if you boil the kombu or squeeze the bonito flakes during the straining process.
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