Japan (Portuguese influence). Tempura derives from the Portuguese technique of peixinhos da horta (vegetables dipped in batter and fried), introduced by Portuguese missionaries and traders in the 16th century. The Japanese refinement produced a technique far lighter and more precise than the original Portuguese preparation.
Tempura is the lightest batter in world cooking — a barely-mixed combination of egg, ice water, and flour that coats prawns and vegetables in a translucent, glass-like shell that shatters at the bite and is almost invisible on the tongue. The coldness of the batter, the heat of the oil, and the minimal mixing are the three pillars. Everything about tempura is in opposition to the instinct to make batter thick and well-mixed.
Chilled Hakkaisan junmai ginjo sake — the light, clean flavour of Niigata's premium sake does not compete with the delicate tempura coating. Alternatively: cold Sapporo lager with a side of pickled ginger.
{"Tiger prawns (kuruma-ebi): tail-on, deveined, straightened by scoring the underside at 1cm intervals and pressing flat — this prevents the prawn from curling in the oil","Vegetables: kabocha (Japanese pumpkin), shiso leaf, maitake mushroom, lotus root sliced thin, sweet potato — each cut to expose maximum surface area to the batter","The batter: one egg yolk, 200ml ice water, and 100g soft cake flour (T45) — combine with chopsticks in exactly ten strokes. The batter should be lumpy and full of dry flour patches. This is correct. A smooth tempura batter produces a doughy coating","Ice water is essential: the cold retards gluten development. Warm water produces a tough, chewy batter","Oil temperature: 180C for prawns and most vegetables, 160C for dense kabocha — use a thermometer and maintain the temperature by frying in small batches","Tentsuyu dipping sauce: dashi, mirin, and soy sauce in a 4:1:1 ratio, with grated daikon (mooli) and fresh ginger"}
The moment where tempura lives or dies is the batter temperature — the batter must be used within 10 minutes of mixing, because the ice melts and the gluten continues to develop even after you stop mixing. Some tempura masters add ice cubes directly to the batter bowl and work around them. The coldest batter produces the crispest, most shatteringly light coating.
{"Over-mixing the batter: the lumps of unmixed flour are what produce the airy, irregular, glass-like shell characteristic of good tempura","Warm batter: gluten develops and the coating becomes thick and chewy","Crowding the oil: drops the oil temperature, producing greasy, oil-saturated batter"}