Ultra-light, lacy Japanese tempura batter for prawns and seasonal vegetables, served with tentsuyu dipping broth and grated daikon.
Tempura (天ぷら) is one of Japanese cuisine's greatest technical achievements: a batter so light and thin it becomes translucent after frying, creating a gossamer shell that lets the ingredient's natural color and texture shine through. Paradoxically, this lightness requires more discipline than a thick, heavy batter — the cardinal rule being cold everything: ice-cold water, a chilled bowl, minimal mixing (lumps are welcome), and immediate use. Over-mixing develops gluten in the flour, which produces a thick, chewy, bread-like crust antithetical to proper tempura. The dish traces its origins to the mid-16th century, when Portuguese Jesuit missionaries in Nagasaki brought the Iberian practice of frying vegetables in batter during the Ember Days (Quatuor anni tempora in Latin — the name likely deriving from this). Japanese cooks refined the technique over the following two centuries into something distinctly their own: lighter, more restrained, and elevated to a fine-dining art in Edo-period Tokyo where specialist tenpura restaurants (tenpuraya) commanded the same reverence as French starred restaurants. The choice of oil matters enormously — traditional Tokyo tempura uses sesame oil blended with cottonseed oil for a distinctive nutty aroma; home cooks can achieve excellent results with a neutral oil kept at a precise 170–180°C.
Serves 4
Pat all vegetables and prawns completely dry with paper towels. Score the underside of each prawn through the flesh at 5 mm intervals — this releases the tendons and keeps them straight during frying. Lightly dust all ingredients with a thin coating of dry flour and shake off excess — this helps batter adhere and prevents steam explosions.
Surface moisture is tempura's worst enemy — it prevents batter adhesion and causes dangerous oil splatter.
Combine dashi, soy sauce, and mirin in a small pot. Bring to a gentle simmer for 2 minutes. Remove from heat. This is your dipping sauce — serve warm with grated daikon stirred in at the table.
Fill a deep, heavy pot to 8 cm depth with oil. Heat to exactly 175°C for vegetables, 180°C for prawns. Use a thermometer — temperature control is the difference between light and greasy tempura. Drop a small batter drip into the oil to test: it should sink slightly, sizzle immediately, then rise to the surface within 2 seconds.
In a chilled bowl over ice, whisk egg yolk into ice-cold sparkling water. Add flour all at once and stir with chopsticks just 3–4 times — leave large visible lumps. The batter should look like thin cream with dry flour bits visible. Make only what you can use in 5 minutes; the batter worsens rapidly as gluten develops.
Use chopsticks, not a whisk — chopsticks make it harder to over-mix.
Dip sweet potato, eggplant, and mushrooms one at a time into batter, letting excess drip off. Lower gently into oil using chopsticks or a spider. Fry in small batches — never fill the oil more than 30% with ingredients. Maintain 175°C. Fry sweet potato 3–4 minutes, eggplant 2 minutes, mushrooms 90 seconds. Remove when batter is very pale gold and crisp. Drain on a wire rack, never paper towels.
Increase oil to 180°C. Dip prawns tail-first into batter. For shiso leaves, batter only one side. Fry prawns 2–2.5 minutes until batter is set and very light blond — not golden. Drain on a rack. Sprinkle tiny drops of batter into the oil and let them adhere to frying pieces for extra laciness (the traditional tane-age technique).
Arrange tempura on a clean rack or paper-lined serving tray. Place tentsuyu dipping sauce and grated daikon alongside. Eat within 3 minutes of frying — tempura turns steamy and soft quickly. In restaurants, individual pieces are served one at a time directly from the fryer for this reason.
Keep a second bowl of ice under your batter bowl throughout frying — cold batter that never warms up produces the lightest shell.
Cake flour or even rice flour gives a more delicate, crisp result than all-purpose flour; commercial tempura flour (usually contains baking powder) is a reliable shortcut.
Never crowd the oil — adding too many pieces drops the temperature below 165°C, making the batter absorb oil and turn greasy instead of crisping.
Between batches, skim any batter droplets (tenkasu/agedama) from the oil surface — burnt bits will darken and bitter your oil.
Kakiage: shredded onion, carrot, and small shrimp bound together with a little batter and fried as a fritter — the 'rough' tempura style used in soba restaurants.
Anago (saltwater eel) tempura: traditional Edo-mae Tokyo preparation — richer and more substantial than prawn.
Gluten-free tempura: substitute rice flour 1:1 for wheat flour and use sparkling water — the results are arguably even crisper.
Tempura don (tendon): two or three tempura pieces laid over a bowl of rice and drizzled with sweet tentsuyu sauce — a complete one-bowl meal.
Tempura does not keep — even 10 minutes after frying it softens significantly. Leftover tempura can be reheated in a 200°C oven on a wire rack for 5 minutes, which partially restores crispness. Alternatively, chop leftover tempura and add it to miso soup or noodle broth as tenkasu (crunchy garnish).
Tempura's entry into Japan is documented from the 1560s in Nagasaki, where Portuguese missionaries fried battered vegetables during Catholic fasting periods. By the mid-Edo period (1700s) tenpuraya (tempura stalls) had proliferated along Tokyo's Sumida River, serving the working class who could not afford proper restaurant dining. Three of Tokyo's 'three great cooking traditions' — sushi, soba, and tempura — crystallized in this era. The first dedicated tempura restaurant in the fine-dining sense appeared in Asakusa in the late Edo period.
Over-mixing is the most common culprit — it develops gluten in the flour which makes a bread-like crust. Stir the batter only 3–4 times, leaving dry lumps visible. Also ensure your water is ice-cold and your oil is at exactly 175°C — too low and the batter absorbs oil instead of crisping.
Yes, though the result will be slightly heavier. To simulate cake flour, replace 2 tbsp of every 100 g all-purpose flour with cornstarch (potato starch works too). The lower protein content produces a more delicate crust.
Root vegetables (sweet potato, lotus root, carrot), eggplant, green beans, shishito peppers, and mushrooms are traditional. Avoid watery vegetables like tomato or cucumber — they release too much steam. King oyster mushrooms and asparagus are excellent modern additions.
It helps — the CO2 bubbles create additional lightness and airiness in the batter. Still cold water works fine, but the texture will be marginally denser. Some Tokyo tenpuraya chefs use still water and rely entirely on ice-cold temperature and minimal mixing for lightness.
Per serving (350g / 12.3 oz) · 4 servings total
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