Wakame Soup

Featured in: Hearty Soups & Stews

This traditional Japanese seaweed soup combines rehydrated wakame with silken tofu in a savory miso and dashi broth. The preparation involves soaking the dried seaweed for just 5 minutes, then simmering everything together for a few minutes. Miso paste is blended separately with hot broth before being incorporated to preserve its probiotic benefits. Finished with soy sauce and a touch of sesame oil, the soup delivers a balanced umami flavor profile. Serve it steaming hot with fresh scallions scattered on top for a light appetizer or comforting meal.

Updated on Wed, 21 Jan 2026 11:07:00 GMT
This bowl of steaming Japanese Wakame Soup features tender seaweed and silken tofu in a clear, savory dashi broth, garnished with fresh green scallions. Save
This bowl of steaming Japanese Wakame Soup features tender seaweed and silken tofu in a clear, savory dashi broth, garnished with fresh green scallions. | forkina.com

The steam rising from a bowl of miso soup still pulls me back to a tiny Tokyo ramen shop where I sat at 2 AM, jetlagged and disoriented, watching the owner prepare soup with this meditative rhythm I couldn't look away from. He told me wakame seaweed was the ocean's gift to tired souls, and something about that phrase stuck with me through all these years of recreating that moment in my own kitchen.

I started making this during college finals when I needed something nourishing but couldn't afford to spend hours at the stove. My roommate would hover around the pot, asking if it was done yet, until we both just started eating it straight from the saucepan with those oversized wooden spoons we got from the dollar store. Now it's my go-to when someone says they're feeling under the weather or just kind of hollow inside.

Ingredients

  • Dried wakame seaweed: A tiny handful expands dramatically in water, so don't be alarmed by how little you start with
  • Dashi stock: The foundational soul of Japanese cooking, though I've used vegetable broth in a pinch and it still works beautifully
  • Silken or firm tofu: Silken feels more luxurious in the mouth but firm holds up better if you plan to make this ahead
  • Scallions: Fresh green onion on top adds this sharp brightness that cuts through the rich miso
  • White miso paste: Milder and sweeter than red miso, perfect for a gentle soup that doesn't overwhelm
  • Soy sauce: Just enough to deepen that savory foundation without making it too salty
  • Sesame oil: Totally optional but adds this nutty finish that makes people ask what your secret ingredient is

Instructions

Wake up the wakame:
Place those shriveled seaweed pieces in a small bowl with cold water and watch them bloom into these beautiful dark green strands while you prep everything else
Gently warm the dashi:
Bring your broth to a bare simmer over medium heat, watching for those tiny bubbles that tell you it's ready but not boiling
Add the tofu and wakame:
Carefully slide in those tender tofu cubes and the rehydrated seaweed, letting them swim together for just a couple minutes until everything is heated through
Dissolve the miso:
Ladle out some hot broth into a small bowl and whisk the miso paste until it's completely smooth, then pour this back into the soup
Finish with seasonings:
Stir in the soy sauce and sesame oil, letting everything meld for one final minute while resisting the urge to boil the life out of it
Garnish and serve:
Those sliced scallions on top aren't just decoration, they add this fresh pop that makes the whole bowl come alive
Bright green wakame seaweed and cubed tofu float in a delicate Japanese broth, creating a simple, nourishing bowl of traditional Wakame Soup. Pin it
Bright green wakame seaweed and cubed tofu float in a delicate Japanese broth, creating a simple, nourishing bowl of traditional Wakame Soup. | forkina.com

My mother in law tried this once and immediately asked for the recipe, which is how I knew it was a keeper since she's usually suspicious of anything that comes from the ocean. Now she makes it twice a week and claims it's her secret weapon against winter colds, though I suspect she just loves how minimal the cleanup is.

Making It Your Own

The beauty of this soup is how forgiving it is as a base. I've added shiitake mushrooms when I needed something more substantial, thrown in spinach during those months when I'm trying desperately to eat more greens, and even stirred in a beaten egg during the last minute for a comforting, ribbly texture that reminds me of egg drop soup from childhood.

Broth Variations

While traditional dashi is made from bonito flakes, I've discovered that kombu and shiitake mushroom broth creates this deeply earthy version that my vegan friends actually prefer. Sometimes I'll use a good quality vegetable broth from the store, adding a piece of kombu while it simmers to infuse that ocean essence.

Serving Suggestions

This soup wants to be part of something bigger, like a supporting character that somehow steals the show. I'll serve it alongside steamed rice and pickled vegetables for a light dinner, or as the first course before a more substantial main. The key is having something ready to soak up that precious broth.

  • Keep extra miso paste in the refrigerator, it only gets better with age
  • Don't refrigerate leftover soup, the texture completely changes and the tofu becomes spongy
  • A sprinkle of sesame seeds on top makes this feel restaurant worthy without any extra effort
Savor a light, aromatic serving of Wakame Soup, rich with umami dashi, soft tofu, and rehydrated seaweed, perfect as a starter. Pin it
Savor a light, aromatic serving of Wakame Soup, rich with umami dashi, soft tofu, and rehydrated seaweed, perfect as a starter. | forkina.com

There's something profoundly grounding about making this soup, like you're participating in a tradition that spans generations while also taking care of yourself in the most basic, nourishing way possible.

Frequently Asked Questions

What is wakame?

Wakame is a nutritious edible seaweed commonly used in Japanese cuisine. It's rich in iodine, calcium, and minerals. When dried, it rehydrates quickly and develops a tender, slightly slippery texture perfect for soups and salads.

Can I make this vegan?

Yes, simply use kombu and shiitake mushroom dashi instead of fish-based dashi stock. Most miso paste is naturally vegan, but always check the label to ensure no fish-derived ingredients are included.

Why shouldn't I boil the miso?

Boiling miso paste can destroy its beneficial probiotics and alter the delicate flavor. The proper technique is to blend miso with a small amount of hot broth first, then stir it into the soup after removing the pot from direct heat.

How long does dried wakame last?

Properly stored in an airtight container in a cool, dry place, dried wakame can last up to a year or more. Keep it away from moisture and direct sunlight to maintain quality.

What can I add to enhance the flavor?

Fresh ginger, sliced mushrooms, spinach, or carrots make excellent additions. A splash of rice vinegar or a sprinkle of red pepper flakes can add depth and subtle heat if desired.

Wakame Soup

Light Japanese soup with rehydrated wakame seaweed, cubed tofu, and savory miso-dashi broth. Ready in 20 minutes.

Prep Time
10 Minutes
Cook Time
10 Minutes
Total Time
20 Minutes


Difficulty: Easy

Cuisine: Japanese

Yield: 4 servings

Dietary: Vegetarian, Dairy-Free, Gluten-Free

Ingredients

Seaweed and Broth

01 0.3 oz dried wakame seaweed
02 4 cups dashi stock (use vegetarian dashi for vegetarian option)

Vegetables and Tofu

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

Seasoning

01 2 tbsp white miso paste
02 1 tsp soy sauce (gluten-free if needed)
03 1 tsp sesame oil (optional)

Instructions

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 and expanded. Drain thoroughly and set aside.

Step 02

Heat the Dashi Broth: Pour dashi stock into a medium saucepan and bring to a gentle simmer over medium heat. Avoid boiling to preserve the delicate flavor profile.

Step 03

Add Tofu and Wakame: Gently add cubed tofu and rehydrated wakame to the simmering broth. Let cook for 2-3 minutes to allow flavors to meld and tofu to warm through.

Step 04

Prepare Miso Mixture: Ladle a small amount of hot broth into a separate bowl containing the miso paste. Whisk vigorously until completely smooth and dissolved, ensuring no lumps remain.

Step 05

Incorporate Miso and Seasonings: Return the miso mixture to the soup, stirring gently to distribute evenly. Add soy sauce and sesame oil if using. Heat for 1 additional minute, being careful not to boil as high heat destroys miso's beneficial enzymes and delicate flavor.

Step 06

Serve and Garnish: Ladle hot soup into serving bowls immediately. Top with fresh scallion slices for color and mild onion flavor. Serve while steaming hot as a light appetizer or accompaniment to a Japanese meal.

Tools You'll Need

  • Medium saucepan
  • Ladle
  • Small mixing bowl
  • Chef's knife and cutting board
  • Whisk or fork

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains soy (tofu, miso paste, soy sauce)
  • Sesame oil may be an allergen for some individuals
  • Verify miso and soy sauce labels for gluten-containing additives if maintaining a strictly gluten-free diet

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 65
  • Total Fat: 2 g
  • Total Carbohydrate: 7 g
  • Protein: 5 g