Tempura

Variations

• This is the batter deep frying names. That guide sorts coatings into three, and its third is "a wet batter: ice-cold water and flour, deliberately under-mixed. The thin, ragged crust of Tempura is the result of not mixing." Dough and gluten files tempura under doughs where you avoid gluten. The whole method comes down to one decision: do not let the network form.
• The other two places on that list are already taken. Bugak is what the guide calls a fourth kind of coating — a cooked, dried starch film that goes into the oil dry. The capeado on a chile relleno is a foam. Tempura is the wet-batter archetype: cold water held on the surface by just enough flour to cling.
• Kakiage: Chop vegetables and shrimp small, fold into batter, and fry as one fritter.
• Tendon: Pile tempura over rice with a sweet-savory sauce.
• Tempura udon/soba: Set the tempura on a bowl of hot noodles.
• Salt-dipped: Skip the tsuyu for matcha or curry salt.

Tips

• Use ice water and mix the batter barely — overmixing builds gluten and turns it soggy.
• Pat the ingredients completely dry so the coating stays thin and crisp.
• Keep the oil at 175°C — batter dropped in should bob straight back up.
• Fry in small batches so the oil temperature doesn't crash.
• The water is iced for two reasons. Gluten needs water and movement (dough and gluten), so cold water means the same number of strokes builds less network. And the guide adds a second: batter liquid should be as cold as you can get it, because a big temperature gap makes the surface puff violently and set open rather than dense. What flashes to steam is the coating's own water.
• Lumps are the sign you stopped in time. A smooth batter is an over-mixed one. Ten or twelve strokes with chopsticks, with dry flour still showing, and then stop. Make it as you need it; a batter that has stood is not worth using.
• A gluten jacket fails in two ways: it goes chewy, and it holds water. While water is present a surface stays pinned at 100°C and nothing browns (browning), so a thick wet coat steams itself from the inside.
• Patting dry is also an adhesion problem. Batter slides off a wet surface, and what does stick has a film of water under it that turns to steam and lifts the coating away.
• 175°C for two minutes. Most of that time goes on driving the water out of the batter rather than on cooking the ingredient, which is why prawn tempura arrives only just done and a slice of squash keeps its bite. Tonkatsu is the opposite case — six minutes at 170°C for a 1.5-2cm loin, because a breadcrumb coating has no water to lose and the whole of that time belongs to the meat.
• Never cover more than two-thirds of the oil's surface. That is the same guide's rule: a crowded pot drops the temperature, the steam weakens, and oil moves into its place.