Summary: Miso soup made with dashi stock from kombu seaweed and bonito flakes, into which miso paste is stirred only off the heat. Tofu is cut into small cubes and wakame is rehydrated in cold water. The soup is not boiled after the miso is mixed in, otherwise it loses its aroma. Scallions are added only to the bowl. Total time 35 minutes, base 6 servings.
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Category: soups, japanese-cuisine
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Quick overview
- Dish: Miso Soup – traditional soup made with dashi stock and miso paste, often with tofu, wakame, and scallions
- Category: soups, japanese-cuisine
- Cuisine: Japanese
- Main ingredient: Miso paste, 4.2 oz (red, fermented) (quality specification)
- Guide: 12 most famous Japanese dishes: traditional recipes of Japanese cuisine
- Total time: 35 minutes (10 min prep + 25 min cooking)
- Difficulty: Easy
- Servings: 6 (Serving weight: 10.9 oz)
- Key technique: Pulling dashi stock below boiling point and stirring miso paste off the heat
- Preparation types: Classic simmering, poaching
- Dietary info & allergens: soy (miso paste, soy sauce), fish (dashi, bonito flakes)
- Suitable for: Everyday Japanese-style breakfast, lunch appetizer, side to rice and pickled vegetables, light dinner, first course of a festive menu.
- Nutritional values (per 1 serving): 135, Protein: 11.0 g, Fat: 6.0 g, Carbohydrates: 9.0 g
- Storage: 2 days in the refrigerator, 1 month in the freezer
- Pairing: Japanese light lager, dry white wine, sencha green tea
- In short: Miso soup made from dashi broth with kombu seaweed and bonito flakes, into which the miso paste is stirred only off the heat. Total time 35 minutes, 6 servings.
WAGUU says: “Miso soup is not boiled. Miso is stirred in a ladle of stock and returned to the pot, which is already off the heat.”
Key facts
| Prep time: | 10 minutes |
| Cook time: | 25 minutes |
| Temperature: | Dashi stock 175–185 °F, miso is stirred in at a temperature up to 175 °F |
| Number of servings: | 6 |
In a nutshell
Miso soup is ready in half an hour, but one sentence decides it: miso is not boiled. The aromatic compounds created by long fermentation evaporate at high temperatures, and the soup remains salty and flat. Dashi stock is pulled below boiling point because kombu seaweed releases bitterness when boiled rapidly. Tofu is added before the miso so it warms through but stays firm. Scallions belong only in the bowl, where they keep their crunch and fresh aroma.
Ingredients
Base servings: 6 servings • Serving weight: 10.9 oz
| Ingredient | Amount | Quality |
|---|---|---|
| kombu seaweed | 0.7 oz | dried, wide sheets |
| bonito flakes | 1.0 oz | dried fish flakes, thin |
| water for dashi | 6.3 cups | soft, chlorine-free |
| miso paste | 4.0 oz | red, fermented, without added colorings |
| firm tofu | 11 oz | firm, in a block, cut into 0.6-inch cubes |
| wakame | 0.7 oz | dried seaweed, rehydrated and drained |
| scallions | 4 pcs | fresh, cut into thin rings |
| soy sauce | 1 tbsp | naturally fermented, for seasoning |
| mirin | 1 tbsp | sweet rice cooking wine |
| sesame oil | 2/3 tbsp | toasted, dark |
| shichimi togarashi | 0.07 oz | Japanese seven-spice blend |
Why you’ll love this recipe
- Ready in 35 minutes: Dashi is pulled, tofu and wakame are cut, and miso is stirred in at the end. The soup is done before the rice.
- Miso off the heat: Miso is stirred in a ladle of stock and returned to the pot off the heat. The aroma stays, the saltiness doesn’t spike.
- Exact ratios for 6 servings: Four teaspoons of miso paste per serving, seven ounces of tofu per batch, and dashi measured to the tablespoon. Everything recalculates based on the number of diners.
Success guaranteed: Miso is a fermented paste of soybeans, grains, and salt. During fermentation, aromatic compounds and enzymes form that break down at high temperatures. That’s why miso is stirred into stock that is no longer boiling. Dashi stock is pulled below boiling point for the same reason: kombu seaweed contains substances that are released as bitterness during rapid boiling and spoil the taste. Bonito flakes are added to the stock only after the kombu is removed and are left to steep only briefly. Tofu is a protein gel that holds water in a network. When boiled rapidly, water is squeezed out of the gel and the tofu toughens. That’s why tofu is added to the soup at the last stage and only warmed through.
Recipe overview
Prep: 10 min | Cook: 25 min | Difficulty: Easy | Servings: 6 | Type: Soup | Origin: Japanese
Detailed instructions
Total progress: 0 % done
Phase 1: Preparing ingredients – 8 min
Appliances: none
1. Wipe the kombu seaweed with a damp cloth, but do not wash it. Put the wakame in a bowl of cold water and let it rehydrate.
2. Take the tofu out of the package, let it drain, and cut it into cubes of equal size. Cut the scallions into thin rings and put them in a bowl.
VKB: The kombu is clean, free of sand, and shiny on the surface. The wakame has rehydrated to several times its size and is drained. The tofu cubes hold their shape and release only a little water when placed on a towel.
Before you move to the next step:
Do not wash the kombu seaweed under water. The white coating on its surface is natural substances that give the stock flavor; you’ll rinse them away with water.
Phase 2: Dashi stock – 12 min
Appliances: pot, kitchen thermometer, strainer
1. Put the kombu in a pot with cold water and place the pot over medium heat. Heat the water slowly until the temperature reaches 175 °F. Remove the kombu from the pot before the water boils.
2. Add the bonito flakes to the hot water and remove the pot from the heat. Let the flakes steep until they sink to the bottom, then strain the stock through a fine mesh strainer. Do not squeeze the stock, so it stays clear.
VKB: The stock is clear, golden brown, and smells of the sea, not of a fish market. The thermometer reads 175 °F when the kombu is removed. The strained flakes remain at the bottom of the strainer.
Before you move to the next step:
Never bring the stock to a rapid boil. The kombu will release bitterness and the stock will turn bitter. Keep the temperature below boiling point and remove the kombu in time.
Phase 3: Warming tofu and seaweed – 5 min
Appliances: pot
1. Return the strained broth to the pot and warm it over low heat. Add the tofu cubes and the rehydrated wakame and let them just heat through in the broth.
2. While heating, do not bring the pot to a boil and do not stir the soup vigorously. The tofu should be warmed to the center but remain firm.
VKB: The tofu cubes are heated through, hold their shape, and do not fall apart when lifted with a spoon. The wakame is soft and unfurled. The broth is still clear.
Before you move to the next step:
Do not boil the tofu hard. Water is squeezed out of the gel, the tofu toughens and breaks apart into the soup.
Phase 4: Stirring in the miso paste – 5 min
Equipment: ladle, small bowl
1. Take the pot off the heat. Put the miso paste in a small bowl, ladle a little hot broth over it, and stir the paste in the bowl until smooth.
2. Pour the dissolved paste into the pot and stir the soup gently. Season with soy sauce and mirin and taste.
VKB: The soup is smooth, without lumps, and dark amber in color. The aroma is full and sweet from fermentation, not sharp. The saltiness is balanced and does not overpower the dashi.
Before you move to the next step:
Do not stir miso into boiling soup. High heat breaks down the aromatic compounds from fermentation and the soup turns flat and overly salty.
Phase 5: Serving – 5 min
Equipment: ceramic bowls, ladle
1. Pour the soup into warmed ceramic bowls. Float scallion rings on the surface and add three drops of sesame oil.
2. Season the soup with a pinch of shichimi togarashi and serve immediately with a bowl of rice and pickled vegetables.
VKB: A thin film of sesame oil shimmers on the surface, the scallion is crisp and green. The tofu and wakame are evenly distributed in the bowl and the soup has not turned cloudy.
Required equipment
| Utensil | Ideal size | Alternative | Risk |
|---|---|---|---|
| pot | 3 qt capacity, heavy bottom | smaller pot and make the broth in two batches | a thin bottom scorches over low heat and the broth turns bitter |
| kitchen thermometer | up to 300 °F, fast response | check for bubbles at the bottom | without measuring, the broth easily comes to a hard boil |
| fine-mesh strainer | 8 in diameter, fine mesh | cheesecloth for straining | a coarse strainer lets flakes through and the broth stays cloudy |
| ceramic bowls | 12 oz capacity | deep plates | a metal bowl heats up and burns your fingers |
| ladle | 3.4 oz capacity, long handle | large spoon | a short handle brings your hand close to the hot soup |
Shopping list
Nutrition profile
Values per 1 serving (without sides). Calculated from average nutrient values of ingredients.
| Nutrient | Per 100 g | Per 1 serving | Per 6 servings |
|---|---|---|---|
| Energy | 184 kJ / 44 kcal | 565 kJ / 135 kcal | 3389 kJ / 810 kcal |
| Fat | 1.9 g | 6.0 g | 36.0 g |
| of which saturated | 0.4 g | 1.2 g | 7.0 g |
| Carbohydrates | 2.9 g | 9.0 g | 54.0 g |
| of which sugars | 1.0 g | 3.1 g | 18.6 g |
| Protein | 3.5 g | 11.0 g | 66.0 g |
| Salt | 0.4 g | 1.1 g | 6.6 g |
Reference intake of an average adult (8400 kJ / 2000 kcal).
WAGUU Pro level
- Pro standard: Tested recipe with precise ratios and visual checkpoints.
- Tip 1: Tested recipe with precise ratios and visual checkpoints.
- Tip 2: Never boil kombu. Let it warm slowly in water to 175 °F, then remove it. A hard boil releases bitter compounds and the broth turns bitter.
- Tip 3: Dissolve miso in a ladle with a little broth and only then return the smooth mixture to the pot. Lumps of miso will not dissolve in the soup afterward.
- Tip 4: Let wakame rehydrate in cold water and drain it well. The seaweed expands to several times its size in water and belongs in the soup drained.
Scientific background
Miso is a fermented paste of soybeans, grains, and salt. During fermentation, aromatic compounds and enzymes form in it that break down at high heat, which is why miso is stirred into broth that is no longer boiling. Dashi broth is kept below a boil for the same reason: kombu contains compounds that are released as bitter substances during a hard boil. Tofu is a protein gel that holds water in a network; during a hard boil, the water is squeezed out and the tofu toughens.
Fine Dining – Professional techniques
- Plate composition: Serve the soup in a dark ceramic bowl where the contrast of white tofu and green seaweed is visible. Place the scallion on the surface in a ring.
- Texture contrasts: Soft tofu contrasts with crisp wakame and scallion. Cut the tofu cubes to the same size so they heat through evenly.
- Temperature contrast: The soup is served very hot but not boiling. Warm the bowl with hot water and empty it just before pouring in the soup.
- Aromatic additions: Add three drops of sesame oil and a pinch of shichimi togarashi to the surface. The aroma is released by the heat and the soup gains a smoky note.
Sensory radar
- Appearance: The soup is dark amber and clear, with a thin film of sesame oil shimmering on the surface. White tofu cubes, green wakame, and scallion rings are visible in the bowl.
- Aroma: Fresh aroma of seaweed and bonito flakes, followed by the sweet aroma of fermented miso. Sesame oil adds a smoky note.
- Taste: Salty and full miso flavor, followed by umami from dashi and a gentle sweetness from mirin. The taste is balanced, not sharp.
- Texture: The soup is smooth and clear, the tofu soft and holding its shape, the wakame offers a brief resistance. The scallion is crisp.
Pairings
- Japanese pale lager: Carbonation and mild bitterness cleanse the palate after the salty soup. Serve chilled to 43–46 °F.
- Dry white wine: Muscadet or Pinot Blanc with higher acidity. The wine’s acidity pairs with the miso flavor and the soup stays fresh.
- Sencha green tea: Warm but not boiling. The tea’s bitterness balances the saltiness of the miso and the dashi flavor.
Variations
- Seafood miso soup:: Add shrimp or pieces of clams to the tofu and let them just heat through in the soup. The flavor is more pronounced and the soup heartier.
- Vegetable miso soup:: Instead of tofu, use thinly sliced carrots and daikon radish. Pre-cook the vegetables in the broth until tender.
Allergens and Dietary Information
Contains: soy (miso paste, soy sauce), fish (dashi, bonito flakes) • Gluten: yes, in soy sauce (miso paste does not contain wheat) • Not suitable for: people with soy and fish allergies
Suitable for
Everyday Japanese-style breakfast, lunch appetizer, side for rice and pickled vegetables, light dinner, first course of a festive meal.
Substitution Guide
- Kombu seaweed:: dried shiitake mushrooms, soaked in water overnight. The flavor will be less oceanic, but the broth will remain full-bodied.
FAQ
Why isn’t miso boiled?
Miso is a fermented paste and its aroma comes from long fermentation. High heat breaks down these compounds, leaving the soup flat and overly salty. So remove the pot from the heat and stir the miso into hot but not boiling soup.
What is dashi and what can I substitute for it?
Dashi is a Japanese basic broth made from kombu seaweed and bonito flakes. You can substitute it with a broth made from kombu and dried shiitake mushrooms; the flavor will be less pronounced, but the soup will remain refreshing.
What type of miso should I use?
Red miso is stronger and saltier, white is milder and sweeter. For an everyday soup, a combination of both works well; for a first course of a festive meal, white miso is suitable.
Can I make the soup ahead of time?
Prepare the dashi broth in advance and store it in the refrigerator for up to two days. Stir in the miso just before serving. A finished soup with miso will lose its aroma in the refrigerator.
Why is the tofu in the soup tough?
The tofu was boiled rapidly or for too long, squeezing out its water. Add it only at the last stage and just heat it through so it stays firm.
Can I use fresh wakame seaweed?
Yes, but first blanch the fresh seaweed in boiling water and let it drain. Add it to the soup at the same time as the dried rehydrated one.
WAGUU Petr advises: Cooking for 6 or more people?
6–8 people: Prepare the dashi broth in one pot and keep it warm. Mix the miso in a ladle for each bowl separately; the soup will stay fragrant. • 10+ people: Choose the vegetable version; carrots and daikon radish will stretch the batch. Make a larger amount of dashi and store it in the refrigerator.
Sides and Serving
Serving: Serve in a warmed ceramic bowl with sliced green onions and a few drops of sesame oil. A bowl of rice and pickled vegetables are served alongside.
Storage and Reheating
Refrigerator: 2 days • Freezer: 1 month • Reheating: Refrigerator: 2 days • Freezer: 1 month • Reheating: Heat the soup over medium heat to 160°F. Stir in the miso only into the warmed soup, never before boiling.
Author: WAGUU Petr & Team • Published: 7 Oct 2026 • Updated: 10 Oct 2026
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Most Common Mistakes
- Miso added to boiling soup – the fermentation aroma evaporates and the soup becomes flat and overly salty. Remove the pot from the heat before stirring in the miso.
- Kombu seaweed boiled in the soup – the seaweed releases bitter compounds and the soup turns bitter. Heat the seaweed in water at 175°F and then remove it.
- Tofu cooked to a mush – rapid boiling squeezes water out of the tofu and it falls apart. Add tofu at the last stage and just heat it through.
- Dry wakame added to the bowl – dry seaweed rehydrates in the bowl and absorbs some of the broth. Let it rehydrate in cold water and drain it well.