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Vegan Miso Soup with Kombu & Shiitake Dashi (No Bonito Flakes)

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This vegan miso soup uses kombu and shiitake dashi for rich, umami flavor - no bonito flakes needed. Easy, authentic, and ready in 15 minutes.

  • Author: George
  • Prep Time: 5 minutes
  • Cook Time: 15 minutes
  • Total Time: 20 minutes
  • Yield: 4 large servings 1x
  • Category: Soup
  • Method: Stovetop
  • Cuisine: Japanese
  • Diet: Vegan

Ingredients

Scale
  • 6 cups of water
  • 2 to 3 pieces of Kombu/Dried Kelp
  • 8 pieces of dried shiitake mushroom
  • 2 tablespoons white miso
  • 1 tablespoon Yondu (or 1 tablespoon low-sodium soy sauce)
  • 1/2 cup cubed soft tofu
  • 2 tablespoons seaweed/wakeme
  • 1 green onion, finely sliced (for garnish)

Instructions

  1. Rehydrate wakame
    Add dried wakame to a bowl of cold water. Soak about 5 minutes, then rinse, squeeze out excess water, and cut into small pieces. Set aside.

  2. Make the broth
    Traditionally, kombu and shiitake are soaked in cold water for several hours before gently heating for the best flavor. For a quicker version, bring dried shiitake in water to a boil, reduce heat to simmer, add kombu, and continue to simmer for 10 minutes.

  3. Prep add-ins
    While the broth simmers, cube the soft tofu and finely slice the green onion.

  4. Strain the dashi
    Turn off the heat. Use tongs to remove the kombu and shiitake from the pot. (You can slice the mushrooms and add them back if you like.)

  5. Add tofu and wakame
    Stir in the tofu cubes and the rehydrated wakame. Let them warm through in the hot broth for about a minute.

  6. Dissolve miso
    Using a small fine-mesh strainer (or a ladle), dissolve the miso paste into the hot broth until smooth and fully incorporated.

  7. Season
    Add a small splash of Yondu (or low-sodium soy sauce/tamari) to season to taste.

  8. Serve
    Ladle into bowls and garnish with sliced green onion.

Notes

For best results, see the Step-by-Step Method and Pro Tips sections in the post for details on making vegan dashi, when to add miso, and how to avoid bitterness or sliminess.