Wakame Soup Japanese Seaweed

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This traditional Japanese soup combines rehydrated wakame seaweed with silky tofu cubes in a savory miso-infused dashi broth. The preparation involves soaking dried seaweed, simmering with aromatics, and carefully incorporating miso paste for umami depth. Ready in under 20 minutes, this light yet satisfying bowl delivers essential minerals while remaining naturally vegetarian and gluten-free when using appropriate ingredients.

Updated on Wed, 21 Jan 2026 10:44:00 GMT
Steaming bowl of Japanese wakame soup with silken tofu, wakame seaweed, and scallions in dashi broth.  Pin it
Steaming bowl of Japanese wakame soup with silken tofu, wakame seaweed, and scallions in dashi broth. | honeylumen.com

The first time I made wakame soup, I was amazed at how something so simple could taste so comforting. I had just come home from a long rainy walk, and within twenty minutes, I was curled up with a steaming bowl that felt like a warm hug in liquid form. The way the silky wakame ribbons dance in the golden broth still makes me pause and appreciate the beauty of uncomplicated food.

Last winter, my friend who was feeling under the weather came over, and I made this soup for her. She took one sip and looked at me with wide eyes, asking how something so minimalist could have so much depth. Now whenever she visits, she half jokingly asks if theres wakame soup on the menu, and honestly, I never mind making it.

Ingredients

  • Dried wakame seaweed: This expands dramatically when rehydrated, so a little goes a long way
  • Dashi stock: The foundation of Japanese cooking, use vegetarian dashi made from kombu to keep it plant based
  • Silken or firm tofu: Silken feels luxurious in the broth, while firm holds its shape better if you prefer substance
  • White miso paste: Its milder and sweeter than red miso, perfect for this delicate soup
  • Soy sauce: Just a touch adds depth without overpowering the miso
  • Sesame oil: Optional but adds a lovely nutty finish that ties everything together
  • Fresh scallions: Their bright bite cuts through the richness and adds fresh color

Instructions

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Wake up the wakame:
Place the dried seaweed in a small bowl with cold water and watch it expand and soften over about 5 minutes
Warm the broth:
Bring your dashi stock to a gentle simmer in a medium saucepan, keeping the heat moderate so it doesnt boil too aggressively
Add the heart:
Gently slide in your tofu cubes and drained wakame, letting them swim together for just 2 to 3 minutes until heated through
Dissolve the miso:
Whisk the miso paste with a ladleful of hot broth in a separate bowl until silky smooth, then return it to the pot
Finish with finesse:
Stir in the soy sauce and sesame oil if using, heating for just one more minute while being careful never to let it boil
Garnish and serve:
Ladle into bowls immediately and scatter those fresh scallion slices on top for a pop of color and flavor
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Serve homemade meals comfortably with sturdy utensils and steak knives for everyday dining and special dinners.
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Serving of nourishing wakame soup garnished with fresh scallions, featuring tender tofu and rehydrated seaweed.  Pin it
Serving of nourishing wakame soup garnished with fresh scallions, featuring tender tofu and rehydrated seaweed. | honeylumen.com

This soup became my go to remedy during stressful weeks at work. Something about the ritual of preparing it, the smell of the dashi filling the kitchen, and that first mindful sip helped ground me when everything else felt chaotic. Now it is not just food, it is a tiny self care practice I return to again and again.

Making It Your Own

Once you are comfortable with the basic version, you will start seeing opportunities to customize. Sometimes I add sliced shiitake mushrooms during the simmering stage, or throw in a handful of baby spinach at the very end so it just wilts. The beauty is in how adaptable this soup is while still maintaining its soul.

The Secret To Great Dashi

I used to rely on instant dashi powder until a friend taught me how to make it from scratch using just water and kombu. The difference is remarkable, with homemade dashi having a cleaner, more nuanced flavor that makes the whole soup sing. If you have an extra hour, it is absolutely worth the minimal effort.

Serving Suggestions

While this soup is beautiful on its own, I love serving it as part of a larger Japanese inspired meal. It pairs perfectly with steamed rice and some simple pickles on the side, or as a light starter before a main course of tempura vegetables. The soup cleanses the palate and prepares your stomach for whatever comes next.

  • Keep extra miso paste in the refrigerator, it lasts for months
  • Try topping with crispy fried garlic for extra texture
  • Make it a meal by adding udon noodles to the broth
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Close-up photo of wakame soup, a Japanese seaweed soup with savory dashi broth and delicate tofu cubes. Pin it
Close-up photo of wakame soup, a Japanese seaweed soup with savory dashi broth and delicate tofu cubes. | honeylumen.com

There is something profoundly healing about a bowl of wakame soup. I hope it brings you as much comfort and quiet joy as it has brought me over the years.

Recipe FAQs

What does wakame taste like?

Wakame offers a subtle ocean flavor with a tender, slightly slippery texture. When rehydrated, it becomes mild and naturally sweet, absorbing the savory miso broth beautifully.

Can I make this vegan?

Absolutely. Use kombu and shiitake mushroom dashi instead of fish-based stock. Verify your miso paste contains no bonito flakes, and you'll have a completely plant-based version.

Why shouldn't I boil miso?

Boiling miso paste destroys its beneficial enzymes and alters the delicate flavor profile. Always dissolve it in warm broth separately and add it at the end, heating gently without reaching a boil.

How long does dried wakame last?

Properly stored in an airtight container away from moisture and direct sunlight, dried wakame keeps for 1-2 years. Rehydrated wakame should be used within 2-3 days when refrigerated.

What can I add for more substance?

Consider adding sliced shiitake mushrooms, julienned carrots, baby spinach, or cooked udon noodles. For protein enhancement, add edamame or small shrimp if not vegetarian.

Wakame Soup Japanese Seaweed

Nourishing Japanese seaweed soup with tender wakame, tofu, and delicate dashi broth ready in 20 minutes.

Prep Time
10 minutes
Time to Cook
10 minutes
Overall Time
20 minutes


Skill Level Easy

Cuisine Japanese

Makes 4 Portions

Diet Preferences Vegetarian-Friendly, No Dairy, No Gluten

What You'll Need

Seaweed and Broth

01 0.3 ounce dried wakame seaweed
02 4 cups dashi stock

Vegetables and Tofu

01 3.5 ounces silken or firm tofu, cubed
02 2 scallions, thinly sliced

Seasoning

01 2 tablespoons white miso paste
02 1 teaspoon soy sauce
03 1 teaspoon sesame oil

How-To Steps

Step 01

Rehydrate the Wakame: Place dried wakame in a small bowl and cover with cold water. Let soak for 5 minutes until fully rehydrated. Drain thoroughly and set aside.

Step 02

Heat the Dashi Stock: Pour dashi stock into a medium saucepan and bring to a gentle simmer over medium heat.

Step 03

Add Tofu and Wakame: Carefully add cubed tofu and rehydrated wakame to the simmering broth. Cook for 2 to 3 minutes to heat through.

Step 04

Prepare Miso Mixture: In a separate bowl, combine miso paste with a ladleful of hot broth. Whisk until completely smooth and dissolved.

Step 05

Incorporate Seasonings: Stir the miso mixture back into the soup. Add soy sauce and sesame oil if desired. Heat for 1 additional minute, taking care not to boil.

Step 06

Serve and Garnish: Ladle hot soup into bowls and top with fresh scallion slices. Serve immediately while steaming.

Tools Needed

  • Medium saucepan
  • Ladle
  • Small mixing bowl
  • Kitchen knife
  • Cutting board

Allergy Details

Review all components for allergen risks, and consult with a medical professional if you have any questions.
  • Contains soy products including tofu, miso paste, and soy sauce.
  • Verify miso and soy sauce labels for gluten-containing ingredients if strictly gluten-free.
  • Sesame oil may trigger allergic reactions in sensitive individuals.

Nutrition Details (per serving)

Details serve as general knowledge and aren't meant to substitute advice from medical experts.
  • Kilocalories: 65
  • Fats: 2 g
  • Carbohydrates: 7 g
  • Proteins: 5 g