Shiitake Dashi

Shiitake dashi is a simple Japanese plant-based stock made by gently steeping dried shiitake mushrooms and kombu. The slow infusion draws out their natural umami, sweetness and earthy depth, creating a versatile broth for soups, noodles, sauces and many Japanese dishes.

Ingredients

• 4 cups cold water
• 1 piece dried kombu, about 10–12 cm
• 4–5 dried shiitake mushrooms
• 1 teaspoon soy sauce, optional
• ½ teaspoon salt, optional

Method

1. Soak the kombu and shiitake

Place the kombu and dried shiitake mushrooms in a large bowl or saucepan with the cold water. Cover and let them soak for 6–8 hours or overnight in the refrigerator.

This slow soaking is important because it gently extracts the mushrooms’ savory flavor without making the broth bitter.

2. Gently heat the dashi

Remove the kombu from the water and place the liquid with the shiitake mushrooms over low heat.

Heat slowly until the liquid is steaming and just beginning to approach a simmer. Do not vigorously boil the kombu, as this can make the stock taste unpleasantly bitter or slimy.

3. Remove the mushrooms

Once the broth is hot and fragrant, remove the shiitake mushrooms. You can reserve them for another dish.

Strain the dashi through a fine-mesh strainer if you want a particularly clear broth.

4. Season if desired

The dashi can be used completely unseasoned, especially when it will become part of another recipe.

For a ready-to-drink broth, add a small amount of soy sauce and salt according to taste.

How to Use Shiitake Dashi

Use this umami-rich stock as a base for:

• Miso soup
• Udon or soba
• Japanese vegetable soups
• Noodle sauces
• Simmered vegetables
• Tofu dishes
• Rice dishes
• Japanese-style sauces

Storage

Cool the dashi quickly and store it in an airtight container in the refrigerator for up to 3–4 days. It can also be frozen in small portions for convenient use later.

Pro Tip

For the best flavor, don’t rush the soaking process. A cold overnight infusion produces a gentle, naturally sweet broth with deep umami from both the kombu and shiitake.