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    Home » Recipes » Foundations

    Last updated: Mar 24, 2026 by Aaron Fukuyama · This post may contain affiliate links · Leave a Comment

    Vegan Dashi

    Jump to Recipe

    Vegan dashi is a stock that forms the basis for so many japanese recipes. Dishes like Konji, Oden, Ramen, miso and soba (to name a few) all require a dashi to be brewed so that the flavours are well bedded in.  For our fish loving friends, dashi is often made using bonito fish powder mixed with hot water but for most of our vegan recipes we use kombu, and/or dried shiitake mushrooms steeped in hot water.

    vegan dashi simmering - kombu seaweed and dried shiitake mushrooms in a cream saucepan

    At a glance

    Recipe Vegan Dashi
    Ready in 1 hr 5 min
    Serves 4 cups
    Calories ~2 per serving (est.)
    Key ingredients kombu , dehydrated shittake mushrooms, water
    Course Soup

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    This vegan dashi is used for a huge variety of

    You'll need this recipe for lots of my other recipes including my easy vegan miso soup.

    Jump to:
    • Ingredients
    • Instructions
    • Substitutions for vegan dashi
    • Vegan Dashi Variations
    • Storing Your Vegan Dashi
    • Top tip
    • Vegan dashi FAQs
    • Related
    • Pairing
    • 📖 Recipe

    Ingredients

    Vegan Dashi ingredients

    vegan dashi ingredients - kombu seaweed and dried shiitake mushrooms

    Makes 4 cups | Prep time 5 minutes | Cooking time 30 minutes

    • 2 x (6 x 2 inch) pieces of kombu
    • 3 dried shiitake mushrooms
    • 4 cups of water

    Instructions

    cold water being added to a saucepan containing kombu seaweed and dried shiitake mushrooms
    1. Add the kombu and shitake to a saucepan and add the water. 
    shiitake and kombu seaweed simmering gently in water
    1. Heat over a low heat and simmer for about 30 minutes (do not boil).
    rehydrated shiitake and kombu stored in an airtight container after making dashi
    1. Take out the shitake and kombu and store these in an airtight container.
    finished vegan dashi broth - a rich amber stock ready to use
    1. Your dashi is ready to use for your upcoming recipe!

    Hint: Keep an eye on this during the heating process. Make sure to simmer gently and take extra care not to boil the ingredients to save yourself from burning them and destroying the subtle umami-rich flavours.

    Substitutions for vegan dashi

    • If you're needing to save time you can substitute the kombu with kombu dashi powder so instead of brewing the dried ingredients just add this powder to your simmering water a few moments before adding your other ingredients. 
    • You can substitute the shiitake mushrooms with dried porcini mushrooms if you're struggling to find the former. Otherwise leave the mushrooms out completely and just go with a simple kombu stock. In this case I would suggest using double to kombu abd simmering it for at least an hour to bring out more of the umami flavours. 

    Vegan Dashi Variations

    If I'm in a real rush and/or need a fuller flavour I will mix in a teaspoon of kombu dashi powder to the simmering stock to create a stronger base. This is an easy way of making things more flavorsome but (word of advice) be careful as a lot of these powders may contain additives like sugar and msg depending on the brand.

    Storing Your Vegan Dashi

    You may store the vegan dashi in an air-tight container and refrigerate for up to 4-5 days.

    I often keep the extracted pieces of shiitake and kombu for use at a later date. Add to miso soups, stews or gyoza dumplings as required.

    Top tip

    Don't rush this. I would say a 30 min simmering time is an absolute minimum. Often I will brew the stock for longer before using.  

    (For the love of dashi!) Do your best not bring the elements to the boil as you will scorch the flavours. One must be very gentle with these ingredients to conserve the subtle aromas.  

    Vegan dashi FAQs

    Is dashi powder vegan?

    Not all dashi powders are vegan. Look for kombu dashi powder and double check the ingredients. The most famous brand is "Shimaya".

    Can I use nori to make dashi?

    The minimum ingredients needed for the dashi are kombu seaweed and dried shiitake mushrooms. I included some mixed dried mushrooms to round out the flavor and some nori seaweed to lend a bit more sea flavor. The last two are nice-to-haves but not necessary.

    Is kombu just seaweed?

    A member of the kelp family, kombu is a seaweed that makes for a versatile pantry ingredient, providing dishes with umami flavor, nutrients, and minerals. While most kombu comes from Hokkaidō, Japan, it is also cultivated in Korea, where it is known as dashima, and China, where it is known as haidai.

    Can I use vegetable stock instead of dashi?

    Dashi - is a light Japanese stock that is thin like a broth and made from simmering dried tuna flakes, kombu seaweed, shitake mushrooms or a combination of them. As a swap out, a light vegetable stock can be used if you cannot get hold of the ingredients.

    Related

    Looking for other recipes like this? Try these:

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      Vegan Miso Ramen - Quick 10 Minute Recipe
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      Miso Pesto: A Japanese Twist on Classic Pesto

    Pairing

    These are my favorite dishes to serve with [this recipe]:

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      Vegan Fried Chicken
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      Yuzu Ramen (Japanese Citrus Noodle Soup Recipe)
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      Top 5 Japanese Eggplant Recipes

    📖 Recipe

    Vegan dashi. Pieces of kombu seaweed and dried shittake simmering in a cream coloured saucepan

    Vegan Dashi

    Aaron Fukuyama
    Umami broth used for multiple recipes
    Print Recipe Pin Recipe
    Prep Time 5 minutes mins
    Cook Time 1 hour hr
    Total Time 1 hour hr 5 minutes mins
    Course Soup
    Cuisine Japanese, vegan Japanese, vegetarian Japanese
    Servings 4 cups
    Calories 2 kcal

    Ingredients
     
     

    • 2 pieces kombu each piece 4" x 2"
    • 2-3 whole dehydrated shittake mushrooms 3 small or 2 medium
    • 4 cups water

    Instructions
      cook mode 

    • Add the kombu and shittake to a saucepan and add the water
      cold water being added to a saucepan containing kombu seaweed and dried shittake mushrooms
    • Heat over a low heat and simmer for about 60 minutes (do not boil)
      shittake and kombu seaweed simmering in water
    • Take out the shittake and kombu (you may store these in an airtight container for use at a later date)
      rehydrated shittake and kombu seaweed in an airtight container
    • Your dashi is now ready to use for your upcoming recipe or you may cool and store in the your refridgerator for up to 5 days.
      a brown opaque broth infused with shittake and kombu

    Nutrition

    Serving: 1cupCalories: 2kcalCarbohydrates: 0.4gProtein: 0.1gFat: 0.01gMonounsaturated Fat: 0.003gSodium: 14mgPotassium: 8mgFiber: 0.1gSugar: 0.01gVitamin A: 1IUVitamin C: 0.03mgCalcium: 8mgIron: 0.02mg
    Keyword kombu and shiitake broth, kombu and shiitake dashi, vegan dashi, vegan japanese soup base
    Tried this recipe?Let us know how it was!

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    Hi, we're Aaron and Jess!

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    Vegan Dashi

    Vegan Dashi

    Ingredients

    • 2 pieces kombu (each piece 4" x 2")
    • 2-3 whole dehydrated shittake mushrooms (3 small or 2 medium )
    • 4 cups water
    cold water being added to a saucepan containing kombu seaweed and dried shittake mushrooms
    1
    Add the kombu and shittake to a saucepan and add the water
    shittake and kombu seaweed simmering in water
    2
    Heat over a low heat and simmer for about 60 minutes (do not boil)
    rehydrated shittake and kombu seaweed in an airtight container
    3
    Take out the shittake and kombu (you may store these in an airtight container for use at a later date)
    a brown opaque broth infused with shittake and kombu
    4
    Your dashi is now ready to use for your upcoming recipe or you may cool and store in the your refridgerator for up to 5 days.

    Hope you enjoyed cooking this recipe!

    Please rate this recipe to help others find it.

    step 1 of 4