Tempura Advanced Batter Science and Frying

Japan — 16th century adaptation of Portuguese battered vegetable technique; developed as a street food in Edo period; Kanda and Asakusa districts of Tokyo had famous tempura yatai street stalls; institutionalised as a high-end restaurant cuisine in the 20th century

Tempura's extraordinary lightness — the thin, transparent, barely-there batter that creates a gossamer-thin shell rather than a substantial coating — results from precise management of four factors: cold temperature throughout, minimal mixing, low protein flour, and high-temperature oil. Developed from Portuguese peixinhos da horta (battered vegetables) introduced to Japan in the 16th century and transformed into a completely distinct preparation, tempura's Japanese iteration abandoned the dense egg-heavy European batter and achieved a crystalline, shatteringly delicate shell unknown in any other frying tradition. The professional tempura batter is made with ice-cold water (sometimes with ice cubes floating in it), cold eggs, low-protein cake flour or a 50/50 cake/all-purpose blend, and is mixed with a light, almost careless cutting motion that leaves lumps deliberately in the batter.

• Tempura directly evolved from Portuguese peixinhos da horta (green bean fritters) introduced by Jesuit missionaries in 16th century — Japan's most extraordinary culinary transformation of a foreign technique → Peixinhos da horta battered vegetables Portuguese
• Both British beer batter and Japanese tempura are frying batters designed around controlled gluten development — beer batter uses CO2 from the beer to create lightness; tempura uses ice-cold water to retard gluten formation → Beer batter fish and chips British

Essentially neutral batter that acts as a translucent envelope revealing the ingredient inside; the texture — shatteringly crisp exterior giving to the tender interior — is the sensory focus; tsuyu dipping sauce adds the umami and seasoning dimension