Japanese Agedashi Tofu Frying Technique and Dashi Sauce Architecture

Ingredients

• 600 g silken tofu, patted dry on paper towel for 10 minutes before dusting
• 30 g katakuriko (potato starch), applied as a thin, even dust immediately before frying
• For the tentsuyu
• 400 ml dashi
• 50 ml mirin
• 50 ml soy sauce
• For the garnish
• 60 g daikon, finely grated; momiji-oroshi if chilli added
• 20 g fresh ginger, finely grated
• 10 g katsuobushi, bonito flakes, added at service
• 20 g negi (Japanese spring onion), finely sliced, added at service
• 1 litre neutral frying oil, for deep-frying; maintained at 160–165 °C for silken tofu

Method

1. 1
   Combine dashi, mirin, and soy sauce in an 8:1:1 ratio in a small saucepan. Bring to a gentle simmer over medium heat. The tentsuyu is ready when it is steaming and fully integrated — taste for the characteristic light sweetness and clean, delicate salinity.
2. 2
   Cut the silken tofu into four equal blocks. Lay on paper towel and pat the surfaces dry. Leave undisturbed for 10 minutes. The surface should feel tacky but no longer wet to the touch — this reduces violent water-splash on contact with oil.
3. 3
   Heat the frying oil in a cast-iron vessel to 160–165 °C, verified with a thermometer. Cast iron is specified here because its thermal mass sustains temperature against the high water content of silken tofu — this is where the dish lives or dies: oil below this range produces a greasy preparation in which the crust never properly forms; oil above this range ruptures the tofu interior before the exterior sets.
4. 4
   Immediately before frying — not in advance — dust each tofu block lightly and evenly in katakuriko. The coating must be thin: a gossamer film, not a batter. Tap away any excess. The surface should appear matte and barely white.
5. 5
   Lower each block carefully into the oil. Fry without crowding, monitoring oil temperature recovery between batches. The crust is ready when it is pale gold and set — it will sound hollow and light when the oil surface around the tofu quietens to a fine, steady sizzle rather than the aggressive bubble of initial contact.
6. 6
   Remove each block and drain briefly. Ladle the hot tentsuyu into warmed bowls first, then place the fried tofu directly into the liquid. The sauce should be served hot — heat encourages the base of the crust to begin dissolving into the broth, producing the characteristic cloudy, silky coating around the tofu's foot. This dissolution is a quality indicator.
7. 7
   Add garnishes at service: a mound of grated daikon at the side of the tofu, a small portion of grated ginger, a pinch of katsuobushi, and sliced negi. Serve immediately — the shell dissolution is timed to begin at service, not to complete before the dish reaches the guest.