Classic Miso Soup with Tofu, Wakame, and Scallions

Why You’ll Love This Recipe

• Clean, soothing flavor from a gentle dashi base—classic comfort in a bowl.
• Fast: on the table in about 25 minutes, faster with instant dashi.
• Customizable: choose your miso, add enoki, or keep it ultra-simple.
• Perfect side for any rice set, grilled fish, or bento-style meal.

Grocery List

• Produce: Scallions, optional enoki mushrooms
• Dairy: None
• Pantry: White or awase miso paste, dried cut wakame, kombu, katsuobushi or instant dashi powder, soft/silken tofu

Full Ingredients

Dashi from Scratch (Awase Dashi)

• 6 cups (1.4 L) water
• 1 piece kombu (about 10 g; roughly 4 x 4 inches / 10 x 10 cm)
• 15 g katsuobushi (bonito flakes; about 2 loosely packed cups)

Quick Dashi Option

• 6 cups (1.4 L) hot water
• 3 tsp (9 g) instant dashi powder (adjust per package directions)

Soup

• 5 tbsp (80 g) white or awase miso paste
• 7 oz (200 g) soft or silken tofu, cut into 1.5 cm (about 1/2–3/4 inch) cubes
• 2 tbsp (about 3 g) dried cut wakame, soaked in cool water 5 minutes and drained

Finishing & Garnish

• 2 scallions, thinly sliced on a bias
• Optional: 3.5 oz (100 g) enoki mushrooms, trimmed and separated

Step-by-Step Instructions

Step 1: Rehydrate wakame and prep add-ins

Place the dried wakame in a small bowl of cool water and let it soak for 5 minutes. It will expand significantly; drain well. Cut the tofu into neat 1.5 cm cubes. Thinly slice the scallions. If using enoki, trim the root cluster and separate into small bundles.

Step 2: Make the dashi (from scratch or quick)

From scratch: Add 6 cups (1.4 L) water and the kombu to a pot. Heat gently over medium until small bubbles appear and the water reaches about 175°F (80°C), 8–10 minutes. Do not boil. Remove the kombu and bring the water just to a bare simmer. Turn off the heat, add the katsuobushi, and steep 3 minutes. Strain through a fine sieve or paper towel-lined strainer.

Quick: Stir 3 tsp (9 g) instant dashi powder into 6 cups (1.4 L) hot water until dissolved.

Step 3: Warm the dashi and dissolve the miso

Return the dashi to the pot and warm to about 175°F (80°C)—hot and steaming but not boiling. Scoop a ladleful of hot dashi into a small bowl, whisk the miso into it until smooth, then stir this slurry back into the pot. This prevents clumps and keeps the soup clear and fragrant.

Step 4: Add tofu and wakame

Slide in the tofu cubes and the drained wakame. Keep the heat gentle—do not let the soup boil, which can toughen the tofu and mute the miso’s aroma. Warm for 2–3 minutes so everything is heated through.

Step 5: Finish with scallions (and enoki, if using)

Add the scallions. If using enoki, add them now and warm for about 1 minute until just tender but still delicate. Taste and, if needed, whisk in up to 1 additional tablespoon (16 g) miso to adjust seasoning.

Step 6: Serve immediately

Ladle into warmed bowls so the tofu stays hot and the miso stays vibrant. Serve alongside steamed rice and simple grilled fish or vegetables for a balanced set.

Pro Tips

• Never boil miso soup. Keep it around 170–180°F (77–82°C) to preserve aroma and probiotics.
• Use a small sieve or mesh ladle to dissolve miso directly in the pot for ultra-smooth results.
• Choose miso wisely: white (shiro) is mild and slightly sweet; awase is balanced; red (aka) is saltier and deeper—start with less and adjust.
• Cut tofu last and handle gently to keep the cubes tidy and intact.
• If your wakame tastes too strong, give it a quick rinse after soaking.

Variations

• Vegan Dashi: Swap katsuobushi for 2 dried shiitake caps (steep with kombu) for deep, mushroomy umami.
• Heartier Mushroom Miso: Use both enoki and sliced shiitake; simmer shiitake 5 minutes in the dashi before adding miso.
• Clam Miso Soup: Steam 1 lb (450 g) scrubbed littleneck clams in 1 cup (240 ml) water; strain and add the clam liquor to the dashi, then add clams at the end.

Storage & Make-Ahead

Dashi can be made 3–4 days ahead and refrigerated, or frozen for up to 1 month. For best flavor and texture, add miso, tofu, and wakame just before serving. If you must store leftovers, refrigerate up to 24 hours and reheat gently without boiling; the tofu will be softer and the wakame more tender. For meal prep, keep dashi, cut tofu, soaked-and-drained wakame, and sliced scallions in separate containers; combine and heat right before eating.

Nutrition (per serving)

Approximate: 80 kcal; 6 g protein; 3 g fat; 8 g carbohydrates; 1–1.3 g sodium (from miso and dashi). Values vary with miso type and exact amounts.