Authentic Kombu & Shiitake Miso Soup with Silken Tofu

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A delicate Japanese miso soup featuring a naturally brewed dashi broth from kombu and shiitake mushrooms, enriched with silken tofu and fresh green onions for a genuinely comforting bowl of umami. This japanese-inspired soups (vegetarian, gluten-free) ready in about 30 minutes pairs water, in dried kombu, dried shiitake mushrooms for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 120 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 10 min Cook: 20 min Serves 2 Japanese cuisine 120 cal/serving
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Ingredients

Instructions

  1. Step 1: In a medium pot, combine 12 oz water, 12 in dried kombu, and 4 dried shiitake mushrooms; bring to a gentle simmer over medium heat, then remove the kombu after 5 minutes (before boiling) and add the shiitake mushrooms; simmer for 10 minutes.
  2. Step 2: Strain the broth through a fine-mesh sieve into a clean pot, discarding solids, then return to medium heat and add 1/4 cup rehydrated wakame seaweed; simmer for 2 minutes until tender.
  3. Step 3: Reduce heat to low, stir in 2 tbsp miso paste dissolved in 2 tbsp warm water until fully dissolved (do not boil), then add 4 oz firm tofu cut into 1/2-inch cubes.
  4. Step 4: Add 2 tbsp chopped white parts of green onions and cook for 2 minutes until tofu is heated through.
  5. Step 5: Remove from heat, stir in 1/4 cup chopped green parts of green onions, and serve immediately.

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Frequently asked questions

How long does Authentic Kombu & Shiitake Miso Soup with Silken Tofu take to make?

Total time is about 30 minutes (10 min prep + 20 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Authentic Kombu & Shiitake Miso Soup with Silken Tofu?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep water from drying out.

Can I substitute ingredients in Authentic Kombu & Shiitake Miso Soup with Silken Tofu?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Authentic Kombu & Shiitake Miso Soup with Silken Tofu for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Authentic Kombu & Shiitake Miso Soup with Silken Tofu vegetarian?

Yes — this recipe is tagged vegetarian, gluten-free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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