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    VEGAN🧂Consomme Onion Koji

    Updated: May 12, 2025 · Published: Mar 6, 2024 by Vegin Vegan Vegun! · This post may contain affiliate links · 1 Comment

    Here's how to make vegan consomme (onion koji), one of the essential seasonings for vegan, vegetarian and plant-based cooking.

    With just onion koji, you can season all sorts of dishes, like soups, Japanese curries, and pastas! Say goodbye to consomme cubes, veggie bouillon, and vegetable broth!

    Vegan Consomme Onion Koji in a jar
    Jump to Recipe Print Recipe

    This vegan consomme is made with just a few simple ingredients: fresh rice koji, onions, and salt.

    Taste a small portion and you'll be amazed! It's got a surprisingly umami and sweet aroma that'll hit your palate. Yep, it's consommé! It's an incredible seasoning that'll blow your mind.

    As we all know, options for vegan seasonings are pretty limited, but if you have shio koji, soy sauce koji, and consommé onion koji, you're good to go. You'll be able to season food in so many more ways than before!

    Jump to:
    • 🧅Ingredients
    • 🥣Step-by-Step Guide
    • 🥄Tools
    • 🫙Storage Instructions
    • 🧑🏼‍🍳Note When Using
    • 🌱My Favorite Vegan Recipes with Onion Koji
    • 💭Questions
    • 🍽Recipes with Consomme Onion Koji
    • 🖋More Recipes with Onion
    • 📖Recipe Card

    🧅Ingredients

    onion, Fresh Rice Koji, natural salt
    • Fresh Onions: Grate the onion in a food processor (if you've got one!), or use a grater to grate it before using.
    • Natural Salt: Instead of refined salt that has had potassium, calcium, and magnesium extracted, I suggest natural salt that has a high mineral content.
    • Fresh Rice Koji: This recipe requires fresh rice koji. You may be able to get it if you have a miso factory nearby, such as AEDAN Fermented Foods. If you live in Japan, you can get it on Amazon or at any supermarket in your neighborhood.

    How to pick the right onions for vegan consomme onion Koji

    When it comes to making vegan consommé onion Koji, you've got to choose the right onions. Look for ones that aren't too strong-smelling and won't tear when you cut them. Look for onions that are soft with space between the layers, like fresh onions. If you can find fresh onions where you are, I'd suggest giving this recipe a go with those first.

    For exact amounts, please check the recipe card👇

    🥣Step-by-Step Guide

    1. Prepare the ingredients

    Grated onion, Fresh Rice Koji and salt in a bowl

    First, put the grated onion, salt, and fresh rice koji in a bowl.

    2. Mix

    Mix onion koji ingredients in a bowl with a spatula.

    Mix it well using a spatula.

    3. Put into a storage jar

    Store vegan consommé onion koji in clean jars.

    Lastly, put the mixture into a clean glass food storage container or jar, close the lid lightly, and store in a place out of direct sunlight. It'll be ready in about a week in summer and two weeks in winter. If the color starts to change during the process, mix with a clean spoon each time.

    4. Maturing

    Vegan consommé onion koji that has matured and turned pink-beige in color.

    You'll know it's ready when the overall color turns a beautiful pink-beige and the koji can be easily crushed with a finger. Just close the lid tightly and store it in the refrigerator.

    👀Tips:

    If the color changes while you're making it, don't worry. That's just koji maturing, so keep an eye on it. But if you notice any strange smells or mold, you'll need to toss the mixture and start over.

    Spooned vegan consommé onion koji

    🥄Tools

    • Grater OR Food processor OR Hand blender
    • Bowl
    • Spatula
    • Spoon
    • Glass food storage container

    🫙Storage Instructions

    Store in a clean, airtight container in the refrigerator; best used within about 3 months.

    🧑🏼‍🍳Note When Using

    When you use Vegan Consomme Onion Koji, be sure to stir well from the bottom every time. It is important to remember to mix well, especially at the bottom where the saltiness tends to settle. And be sure to use a clean spoon.

    🌱My Favorite Vegan Recipes with Onion Koji

    These are my favourite vegan recipes using onion koji. Most of the recipes are in Japanese, I will upload the English version as soon as possible, until then please use the translation in your browser🙏

    Soup

    玉ねぎ麹活用レシピのひよこ豆のポークビーンズ風

    Vegan Pork Beans

    朝食にオススメの玉ねぎ麹を活用したヴィーガン即席カップスープ

    3 Minutes Cup of Soup

    玉ねぎ麹活用レシピ、ヤングコーンの冷製スープ

    Chilled Baby Corn Soup

    Vegan Borscht

    玉ねぎ麹で味付けした豆乳ともち麦のスープ

    Vegan Barley Soy Milk Soup

    Vegan Rice Noodle Soup

    Pasta

    玉ねぎ麹活用レシピのヴィーガンボロネーゼ

    Vegan Bolognese

    玉ねぎ麹活用レシピ、ソースたっぷりヴィーガン舞茸のクリームパスタ

    Vegan Creamy Maitake Pasta

    Rice

    玉ねぎ麹活用レシピ、ヴィーガンカレーライス

    Vegan Japanese Curry

    玉ねぎ麹活用レシピ、ご飯にかけたレンズ豆のケチャップ炒め

    Vegan Stir-fried Veggies & Red Whole Lentils with Ketchup

    💭Questions

    Q:What can I use it for?

    For example, Vegan bolognese, Vegan cream pasta, Vegan tuna mayo, Vegan béchamel sauce, Vegan Borscht, Vegan Japanese Curry Rice and so on. It can be used as a substitute for consommé in many dishes.

    Q:It has been taking a while to be matured.

    Just make sure the lid isn't on too tight. Koji is breathing during maturation. You can try loosely covering it with plastic wrap.

    Q: Can I use Dried Koji instead?

    I haven't tried making it with dried koji yet. I'll upload the method as soon as I try it out.

    If you like this recipe or have already made it, we'd love to hear your thoughts in the COMMENTS 🐒. Also feel free to ask any questions or leave any requests!

    🍽Recipes with Consomme Onion Koji

    • ヴィーガンミネストローネ(ポークビーンズ風)
      Harty Vegan Chickpea Minestrone (Pork & Beans Style)
    • sir-fried whole red lentils with ketchup
      Vegan Stir-fried Veggies & Whole Red Lentils with Ketchup-Based Sauce
    • ヴィーガンボルシチにパンをディップしているところ
      Vegan Borscht
    • Quick & Easy 3 Minutes Vegan Cup of Soup (Creamy Mushrooms)
      Quick & Easy 3 Minutes Vegan Cup of Soup (Japanese-Style Cream of Mushroom)

    🖋More Recipes with Onion

    • ヴィーガンパクチー豆腐の揚げ餃子
      Vegan Crispy Tofu Gyoza with Cilantro
    • Vegan Japanese Hamburger Steak (Hambagu)

    📖Recipe Card

    瓶に入った玉ねぎ麹

    VEGAN🧅CONSOMME ONION KOJI

    by Vegin Vegan Vegun!
    Here's how to make vegan consommé (onion koji), one of the essential seasonings for vegan cooking. With just onion koji, you can season all sorts of dishes, like soups, Japanese curries, and pastas! Say goodbye to consommé cubes and vegetable broth!
    5 from 1 vote
    Print Recipe Pin Recipe
    Prep Time 10 minutes mins
    Maturing Time 14 days d
    Total 14 days d 10 minutes mins
    Course Seasoning
    Cuisine Japanese

    Equipment

    • Grater OR Food processor OR Hand blender
    • Bowl
    • Spatula
    • Spoon
    • Glass container or Jar

    Ingredients
      

    • 300 g Fresh Onion
    • 100 g Fresh Rice Koji
    • 35 g Natural Salt

    Instructions
     

    • Grate the onion. You can use a food processor or hand blender.
      300 g Fresh Onion
    • Place 1 in a bowl with the koji and salt and mix well.
      100 g Fresh Rice Koji
      35 g Natural Salt
    • Transfer to a storage container. Close the lid or cover loosely with plastic wrap. Store in a place that is not in the sun, and let it sit there to mature.
    • Stir from the bottom with a spoon when the onions begin to color.
    • When the color changes to pink-beige and you can crush the koji rice with your fingers, it's a sign that it's ready. It takes about one week in summer and two weeks in winter to be done.
    • Close the lid tightly and store it in the refrigerator.
    Keyword Koji

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    Comments

    1. Ellie says

      March 19, 2024 at 7:00 pm

      5 stars
      It was perfect for making Japanese curry, thank you!

      Reply

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