Frying a spice paste
Also called bhuna, bhunao, tumis, frying the masala, cooking out the paste
Quick answer
Frying a wet paste of aromatics and spices in fat until its water has gone and the oil separates out — the step that turns a raw paste into a cooked base.
What it does to spices
A wet paste cannot brown while it still holds water, because it cannot rise much above the boiling point until the water has been driven off. So the frying happens in two stages: first the paste steams and loses its raw, sharp edge — the harshness of raw onion, garlic and ginger — and only once it is dry does the temperature climb, the paste darken and the fat reappear, glossy, at the edges of the pan. Cooks across South Asia, Southeast Asia and Mexico use that separating oil as the signal that the paste is cooked. Stopped early, a curry tastes raw and grainy; pushed on, the paste catches and turns bitter.
Why it works
While water remains, the paste is held near 100 °C: it steams, softens, and loses volatile sulfur compounds from the alliums and ginger, but browning reactions are slow. As the water evaporates the temperature rises well above boiling and Maillard reactions and caramelisation begin, producing the deeper, roasted flavours. The fat, which had been dispersed through the watery paste, separates out once the water that emulsified it has gone — which is why its appearance marks the change from steaming to frying.
How it goes wrong
- Stopping before the oil separates, which leaves a raw, grainy, sharp-tasting base.
- Heat too high at the start, so the outside of the paste scorches before the water inside has gone.
- Adding dry ground spices after the paste has dried, where they burn in seconds.
Spices it matters for
- Onion — The bulk of most pastes; its sweetness develops only once the water has gone.
- Garlic — Loses its raw sharpness in the steaming stage.
- Ginger
- Galangal — Survives the long frying of a rendang or rempah better than most aromatics.
- Ancho — Mexican adobos and moles fry the blended chilli purée before any liquid goes in.
- Mulato
What it changes in the spice
The chemistry this technique sets off, explained in full on the science page.
What it is called
The same technique in the traditions that use it, each named in its own terms.
Bhuna, bhunao
North Indian and Pakistani
The masala fried until the oil separates, often with repeated small additions of water.
Tumis, pecah minyak
Malay and Indonesian
“Until the oil splits” — the rempah or bumbu is cooked until the oil breaks away from it.
Frying the curry paste in cracked coconut cream
Thai
Coconut cream is reduced until its own oil separates, and the paste is fried in that.
Frying the purée
Mexican
The blended chilli purée for a mole or adobo is fried in hot lard or oil before stock is added.
Where it is used
The pairings that specifically call for this technique.
- Ancho with pork — Adobo and the slow-braised pork traditions of central Mexico. Ancho gives body as well as flavour — a rehydrated pod purées to a thick paste — so it seasons and thickens a braise at once, which is why the sauce clings rather than pooling.
- Onion with tomato — Cooked together they make the base of more dishes than almost any other pair: sofrito, mirepoix with tomato, the masala that starts most North Indian curries. Onion supplies sweetness and body, tomato supplies acid and moisture, and the acid keeps the onion sweetness from turning cloying.
- Mulato with turkey — Mole poblano over turkey is the dish this chilli exists for, and the pairing is structural rather than incidental: turkey is lean and mild, and a sauce built on thick-fleshed sweet chillies supplies the fat-carried richness and body the bird has none of. Mulato is the darkest of the three chillies in that sauce.
- Galangal with onion — Indonesian shallots are the bulk of a spice paste and galangal is one of the aromatics they carry. The relationship is one of proportion — a great deal of shallot, a little galangal — and it is why the pastes taste sweet and deep rather than sharp: the allium is cooked down before anything else happens.
- Doubanjiang with beef — Water-boiled beef, the Sichuan dish of sliced beef poached in a seasoned broth under fried chilli and Sichuan pepper, starts from vegetables stir-fried with doubanjiang. In a study that cooked the dish with and without the paste, leaving it out made the dish less savoury and less liked.
- Doubanjiang with tofu — Mapo tofu, bean curd in a chilli and Sichuan pepper sauce, is built on doubanjiang fried in oil until the oil turns red. Tofu is bland and takes its seasoning from the sauce, and the paste supplies the salt, the savouriness and much of the colour.
Questions this page answers
- why fry curry paste until the oil separates
- what is bhuna
- how long to fry masala
- what does pecah minyak mean