Tempura Prawns

Tempura batter is the opposite of most batters. It should be lumpy, barely mixed, and extremely cold. Over-mixing develops gluten, which produces a thick, bready coating. The aim is a thin, light, almost translucent shell that shatters when bitten.

The Dipping Sauce

Combine the dashi, soy sauce, and mirin in a small pan. Bring to a brief simmer and remove from heat. If serving with daikon, grate it finely and squeeze out excess moisture. Set the sauce aside.

The Prawns

Peel the prawns, leaving the tails on. Devein. Score the underside of each prawn with shallow diagonal cuts every centimetre — this prevents them from curling in the hot oil.

The Batter

Make the batter immediately before frying. Whisk the egg yolk briefly with the ice-cold sparkling water. Add the flour all at once and stir 3–4 times only. Stop. There should be visible lumps and dry patches of flour — this is correct.

Frying

Heat oil to 180°C in a deep pan. Dust each prawn lightly with flour, then dip into the batter, letting excess drip off. Lower into the oil immediately. Fry for 90 seconds to 2 minutes until very lightly golden — tempura should be pale, not brown.

Drain on a rack. Serve immediately with the dipping sauce and a small mound of grated daikon if using.

Method

The batter is the discipline. Unlike Western batters where you work the flour to develop gluten structure, tempura demands the opposite: minimal mixing, visible lumps, and a temperature drop to near-freezing. Over-mixing creates a thick, bread-like crust that entombs the prawn. What you want is a thin, almost translucent shell that fractures on the bite. The cold carbonated water deep-frying|deep-fries into steam pockets instantly, creating lift and crispness; the bubbles in the sparkling water give you that characteristic cratered surface.

Prepare the dipping sauce first. Combine the dashi, soy sauce, and mirin in a small pan, bring it just to a simmer, then kill the heat. If you're using daikon, grate it finely on a microplane and squeeze the gratings hard in your fist over the sink — excess moisture dulls the peppery bite. Set both aside.

Shell the prawns leaving the tail segment intact for grip and presentation. Devein by running a knife along the back. Score the underside with shallow diagonal cuts at roughly centimetre intervals; this prevents the prawn seizing into a ball as the exterior protein sets. Make the batter only when your oil hits temperature. Whisk the egg yolk with the ice-cold sparkling water for ten seconds, then add all the flour at once. Stir three or four times — stop there. You should see flour clumps and dry patches. This chaos is correct.

Heat your oil to 180°C in a deep, heavy pan (a thermometer is non-negotiable here; a visual guess will undercook or burn). Dust each prawn lightly with the extra flour — this creates a grip for the batter. Dip it into the batter, let the excess drain back into the bowl, then lower it into the oil. The batter should crackle immediately. Cook for ninety seconds to two minutes maximum, watching for that pale, almost blonde colour. Brown means the oil is too hot or you've overshot the time. Remove to a wire rack — never paper towels, which trap steam and turn the crust soggy.

Serve immediately. The window between frying and eating is roughly three minutes before the batter loses its snap. Dip each prawn into the sauce, add a small pile of grated daikon if using, and eat while the shell still shatters.