Making Proper Dashi
You don't boil the life out of dashi. It is a process of extraction, not reduction, relying on the quiet infusion of minerals from dried kelp and the smokiness of fermented skipjack tuna.
Patience is your primary ingredient
Keep the heat low throughout the process; if the water boils, the stock will turn bitter and murky. Use filtered water if your local tap water has a strong mineral or chlorine profile.
- medium saucepan
- fine-mesh sieve
- cheesecloth or paper coffee filter
What goes in.
- 4 cupscold water
- 4 inch squaredried kombu (kelp)
- 1 cupkatsuobushi (dried bonito flakes)
Respect the simmer
Remove the kombu the moment small bubbles appear at the edges of the pan, and never let the bonito flakes reach a rolling boil to preserve the clarity of the stock.
The method.
Soak the kombu
Place the kombu in the cold water. Let it sit for at least 30 minutes, or up to overnight if you have time, to rehydrate the kelp.
Heat gently
Turn the burner to medium-low. Watch the pot closely; as soon as you see tiny bubbles forming around the kombu, lift it out with tongs and discard it.
Infuse the bonito
Bring the water to a soft simmer, then immediately kill the heat. Stir in the katsuobushi. Let the flakes steep for 2 to 3 minutes until they sink to the bottom.
Strain
Line your sieve with cheesecloth and pour the stock through into a bowl. Do not squeeze the flakes, or you will press bitterness into the liquid.
Other turns to take.
Kombu Dashi
Omit the bonito flakes entirely. This is a purely plant-based stock that highlights the clean, briny flavor of the kelp.
Iriko Dashi
Replace bonito flakes with dried baby sardines. This creates a much stronger, punchier flavor profile often used for miso soup.
When it doesn't go to plan.
Save the used kombu; it can be sliced thin and simmered with soy sauce and sugar for a side dish.
Keep leftover dashi in the refrigerator for no more than three days, as it loses its aromatic profile quickly.
If you are in a rush, a 20-minute soak for the kombu is sufficient, but a longer soak provides a deeper base.
The ones that keep coming up.
Can I use dashi powder instead?
Dashi powder is a shortcut containing salt and flavor enhancers that don't replicate the nuanced, layered character of handmade stock.
Why is my dashi cloudy?
You likely let the water reach a rolling boil or you squeezed the bonito flakes during the straining process.
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