Shiitake Dashi (Dried Mushroom Stock, Soaked Cold Overnight)
椎茸出汁
https://japanese-kitchen-brothers.com/pages/recipe-shiitake-dashi-dried-mushroom-stock-soaked-cold-overnight
A deep, earthy stock from dried shiitake and cold water. Add kombu for a full vegan dashi.
👨🍳"I set the jar in the fridge before bed. Breakfast miso soup is already half done."
Ingredients
Serves 4Stock
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Umami Dried shiitake mushrooms4 (~15 g)thick caps are best
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Cold water500 ml (2 cups)soft tap water is fine
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Umami Kombu (Authentic)5 g (a 5 cm square)
Taste & Texture Profile
The one-hour soak tastes lighter and a bit sharper. The overnight soak with kombu tastes rounder and deeper.
Taste Profile
Texture Profile
Sensory Notes
Earthy mushroom with a light smoky edge.
Almost silent. Only tiny bubbles tick at the pot edge.
Light amber, like weak tea.
Taste it warm. Cold stock hides the mushroom aroma.
Deep, woodsy mushroom with a soft sea note from kombu.
A quiet drip as the stock falls through the paper.
Clear, deep amber with a golden shine.
Best around 60C in soup. The umami feels strongest warm.
Instructions
Rinse the dried shiitake quickly under cold water. Rub off any dust with your fingers. Do not let them sit in the rinse water.
Put the shiitake gills down in a bowl with the water. Press them under with a small plate. Soak at room temperature for 1 hour.
💡 Why boiling water gives a flat stock
Boiling water softens shiitake in 20 minutes. But it also stops the enzymes too early. Those enzymes build the savory taste later. One hour in room-temperature water keeps them working.
Hot water is faster. Why not use it?
Fast, but the stock tastes thin.
So one hour is the shortcut, not ten minutes.
Put the water and kombu in a jar. Add the shiitake gills down. Keep them under with a small plate or cup. Chill for 8 to 24 hours.
💡 A cold night builds the most umami
Cold water soaks in slowly and evenly. It also slows an enzyme that breaks umami down. At about 5C, the caps swell fully by morning. The kombu adds glutamate to the same jar.
Put it in before bed. That is the whole trick.
The fridge does the work while I sleep?
Yes. The best dashi here is the laziest one.
Lift out the shiitake and squeeze them gently over the bowl. Remove the kombu too. Save both for simmered dishes.
Pour the liquid into a pot. Leave the last spoonful and any grit in the bowl. Warm it gently and hold just below a boil for 10 minutes.
💡 Gentle heat makes more umami
The soaking liquid is not finished yet. Gentle heat wakes a second enzyme. Between about 60C and 70C, it makes guanylate. A hard boil stops it and clouds the stock.
I thought soaking made the dashi.
Soaking starts it. Warming finishes it.
So small bubbles, never a rolling boil.
Line a sieve with a paper towel. Pour the stock through and let it drip. Use it within 3 days.
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Why does my shiitake dashi taste bitter?
It may have soaked too long at room temperature. Or it boiled hard. Soak cold, and keep the heat gentle.
What can I do with the soaked shiitake?
Slice them into simmered dishes, rice, or miso soup. They are chewy and full of flavor. Cut off the hard stems first.
Is shiitake dashi vegan?
Yes. With kombu, it is the classic stock of Buddhist temple cooking. It has no fish at all.
How long does shiitake dashi keep?
Keep it in the fridge for up to 3 days. Freeze it in ice cube trays for about a month.
What kind of dried shiitake should I buy?
Thick, cracked caps called donko give the richest stock. Thin, flat koshin caps are cheaper and fine for slicing.
