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Cooking in fat · intermediate

Deep-frying

Cooking food fully submerged in hot oil.

121 recipes use it

What it is

Deep-frying immerses food completely in oil at 160–190 °C. It is the method for pakoras, samosas, puris, jalebi, chips, tempura and fried chicken.

Why cooks use it: Oil surrounds the food, cooking every surface at once and forming a crisp, dry crust while the inside steams.

The science

Water at the surface boils off vigorously, forming a dry crust and an outward flow of steam that limits oil uptake. Most oil is absorbed as food cools after leaving the fryer, so draining well and frying at the correct temperature both reduce greasiness.

How heat moves into foodThe Maillard reactionSmoke point of fatsFats and oilsOxidation and rancidityMoisture and textureChanging texture: tenderising and crisping

Step by step

  1. Use a deep, heavy pan or a kadhai/wok and fill it no more than half to one-third full with oil.

  2. Heat the oil to the target temperature with a thermometer clipped to the side.

  3. Pat food dry or let excess batter drip off.

  4. Lower food in gently with a slotted spoon in small batches.

  5. Fry, turning, until evenly golden and cooked through.

  6. Lift out, drain on a wire rack, and let the oil recover its temperature before the next batch.

Heat and timing

  • Deep-frying 160–190 °C · 160–170 °C for thick or dense items and the first fry of chips; 175–190 °C for quick-cooking items, puris and the second fry.

Time: 1–2 minutes for puris; 3–5 minutes for pakoras; double-fried chips about 5–6 minutes then 2–3 minutes.

How you know it’s right

  • Food rises and floats
  • Bubbles become smaller and quieter as moisture leaves
  • Puris puff fully when pressed gently
  • Even golden colour

Common mistakes

  • Oil not hot enough (greasy food)
  • Too many pieces at once
  • Wet food or ice crystals going in
  • Reusing dark, foamy oil

Troubleshooting

Greasy, heavy pakoras
Raise the oil to 175–180 °C, fry smaller batches and drain on a rack.
Dark outside, raw inside
Lower to 160–165 °C or make smaller pieces; double-fry thick items.
Oil foaming
It is old or contaminated; replace it.

Restaurant DNA

How professionals do it

Restaurant fryers hold oil at a set temperature and are filtered daily. Kitchens commonly blanch chips and some fried items at a lower temperature ahead of service and finish them hot to order.

At home

A heavy kadhai or Dutch oven with a clip-on thermometer, small batches, and a wire rack instead of paper towels.

General professional practice — not any particular restaurant’s recipe.

Food safety

  • Keep oil between 160 and 190 °C; never let it smoke.
  • Never fill the pan more than half full, and never add water or wet food in quantity.
  • If oil catches fire, turn off the heat and cover with a lid or fire blanket; never use water.
  • Cool used oil completely before straining or disposing of it.

Practise it

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