Agedashi Tōfu

Silken tofu in a lacy potato starch crust, deep-fried until barely golden, then lowered into a dashi broth seasoned with mirin and soy sauce: one of the most elegant constructions in Japanese cooking

Origin: Japan

From the journey of Soy.

Agedashi tōfu (揚げ出し豆腐, 'deep-fried dashi tofu') is a preparation of exceptional technical finesse: soft tofu, its surface dried and then dusted in potato starch (katakuriko) or cornstarch, is deep-fried at high temperature for a brief time, producing an outer shell of translucent, lacy starch crust whilst the interior remains cool, silky, and essentially raw. The fried tofu is then placed in a bowl and partially submerged in a light, hot broth of dashi, mirin, and soy sauce (mentsuyu), which the starch crust immediately begins to absorb, creating a transition zone between crispy exterior and soupy broth that is one of the most pleasurable textural experiences in Japanese cooking. The dish is documented in Japanese cookbooks from the Edo period, appearing in the 1782 text Tōfu Hyakuchin ('One Hundred Tofu Preparations') by Okamoto Kaneaki, which catalogued one hundred recipes for tofu — evidence of the extraordinary depth of the Edo period tofu tradition. Agedashi tōfu appears in that text as an already established preparation, suggesting its origins lie further back in Buddhist monastery cooking, where tofu was the primary protein and cooks had generations of experience developing its culinary possibilities. The key technical insight of agedashi tōfu is the use of potato starch rather than flour: flour creates a thick, opaque, wheat-tasting coating, whilst potato starch creates a thin, nearly transparent crust with no flavour of its own, allowing the soy milk sweetness of the tofu to be tasted through the crust. The brief frying time preserves the interior's softness whilst setting the outer shell. This is a dish that teaches, through a single preparation, both the fragility and the resilience of silken tofu.

Ingredients

Tofu

  • 600 g silken or soft tofu (medium-firm silken works best)

Coating

  • 6 tbsp katakuriko (potato starch), or cornstarch as substitute

Frying

  • 500 ml neutral oil, for deep-frying

Broth

  • 300 ml dashi stock (kombu and bonito, or instant dashi)
  • 3 tbsp mirin
  • 3 tbsp soy sauce (light or regular shōyu)

Garnish

  • 1 tsp finely grated fresh ginger
  • 2 spring onions, finely sliced
  • 1 tbsp katsuobushi (dried bonito flakes)
  • 0.5 tsp shichimi tōgarashi (Japanese seven-spice blend, optional)

Method

  1. Remove the tofu from its packaging and place it on several layers of kitchen paper or a clean tea towel. Press gently with more kitchen paper on top and leave for 15–20 minutes to draw out excess moisture. The drier the tofu surface, the more cleanly the starch coating adheres and the crisper the result.
  2. Cut the dried tofu into neat rectangles or cubes, approximately 5 cm × 4 cm × 3 cm. Handle gently: silken tofu breaks easily. Keep them on a dry tray.
  3. Make the broth: combine the dashi, mirin, and soy sauce in a small saucepan. Bring to a simmer and taste: it should be savoury and slightly sweet with a clean umami finish. Keep warm.
  4. Heat the oil in a deep saucepan or wok to 180°C. While the oil heats, prepare a tray lined with kitchen paper. Spread the potato starch in a shallow bowl. Working with one piece of tofu at a time, dust all surfaces lightly but thoroughly in the starch. Shake off any excess: only a thin, even coat is needed.
  5. Carefully lower 3–4 dusted tofu pieces into the hot oil using a slotted spoon or spider. Fry for 2–3 minutes, turning gently once, until the surface is just set and very lightly golden. The colour should be pale gold, not deep brown. Remove and drain on kitchen paper. Work in batches.
  6. Divide the warm broth between four deep bowls. Place two or three pieces of hot fried tofu into each bowl, so they are partially submerged in the broth. Top with grated ginger, spring onion, and a small tuft of katsuobushi. Add a pinch of shichimi if using. Serve immediately.

Notes

Silken tofu comes in a range of firmnesses from custard-soft to medium-firm. The best choice for agedashi tōfu is the firmest silken variety available: it holds its shape during frying without being too dense or losing the characteristic soft interior. Regular firm tofu is not suitable; it produces a different dish. Katakuriko (potato starch) is the traditional coating and the correct choice: its fine, smooth texture creates the classic translucent crust. Cornstarch produces an acceptable but slightly thicker and less elegant result. The broth (dashi, mirin, soy sauce) is the same base as mentsuyu (Japanese noodle dipping sauce): prepared mentsuyu concentrate diluted with dashi is an acceptable shortcut.

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