How to Make a Curry Base (Bhuna Masala)

What is bhuna?

Bhuna comes from a verb meaning to roast or fry while stirring. In a curry it describes cooking a masala slowly until its water has evaporated and the fat has separated, so the spices are cooked in oil rather than boiled in water. A dish can also be called a “bhuna” in its own right, such as chicken bhuna, when the sauce is reduced right down to cling to the meat. Here we use the word for the base itself: the sauce foundation that you build before you add meat, paneer or vegetables.

The point is flavour and texture. Raw tomato is sharp, raw ground spices taste dusty, and raw onion tastes harsh. Cooking all three together in fat, patiently, turns them sweet, savoury and rounded. That is why a well-made curry tastes deeper than the sum of its ingredients, and why a rushed one tastes “raw”.

What goes into a bhuna masala?

Quantities below are for one curry serving four with 750 g of meat, as in the Punjabi chicken curry:

Ingredient	Amount	What it does
Ghee or neutral oil	40 g (3 tbsp)	Carries flavour and cooks the spices
Cumin seeds	2 g (1 tsp)	First flavour layer, bloomed in fat
Onions, thinly sliced	450 g (3 large)	Sweetness and body
Ginger-garlic paste	22 g (1.5 tbsp)	Pungency and aroma
Ground spices (Kashmiri chilli, coriander, turmeric)	About 10 g in total	Colour, earthiness, mild heat
Fresh tomatoes blended smooth, or passata	300 g	Acidity, moisture, body
Salt	A pinch with the onions, the rest later	Draws water from the onions and seasons

Thin, even onion slices cook evenly. Thick or uneven pieces catch at the edges while the middle stays raw.

How do you cook the onions, and what colour should they be?

This is the longest stage and the one most worth being patient with. Use a wide, heavy-based pot or kadai over medium heat. Heat the fat, add the cumin seeds and let them sizzle and darken slightly, about 20 seconds, then add the onions with a pinch of salt. Stir every minute or two.

Stage	Time (approx.)	What you see	Use for
Translucent	3 to 5 minutes	Soft, glassy, no colour	Light dishes, bhurji, upma
Pale gold	8 to 10 minutes	Edges turning golden, soft throughout	Quicker curries such as the lamb curry
Deep golden	12 to 15 minutes	Rich golden-brown, sweet smell	Dhaba-style curries
Dark brown	20 minutes or more	Dark, bitter edges	Too far for most dishes

The pinch of salt draws the moisture out of the onions, which helps them soften before they colour. If they brown faster at the edges than in the middle, reduce the heat and add a tablespoon of water. If they catch on the pot, add a splash of water and scrape the base: those browned bits dissolve into the sauce.

Deep golden is the target for a dhaba-style curry. It is a colour and a smell (sweet, toasty), not a fixed number, so check by eye. A different onion, a different pot or a hotter hob all change the timing. Small amounts of finely chopped onion, as in bhurji, reach each stage in about half the time.

When do the ginger and garlic go in?

After the onions have reached the colour you want, and not before. Fresh ginger and garlic scorch quickly, and burnt garlic turns bitter. Add the paste, cook for about 1 minute, stirring, until the raw smell disappears and it begins to stick to the pot. If it sticks hard, add a splash of water.

If you use freshly chopped ginger and garlic instead of paste, add them at the same stage, and stir constantly, as chopped garlic catches faster than paste.

How do you add the ground spices without scorching them?

Ground spices are powdery, so they burn in seconds. Do three things:

1. Lower the heat to medium-low before adding them.
2. Add them to the fat, pushing the onions aside if needed, and stir for about 30 seconds.
3. Add 1 to 2 tablespoons of water if they start to catch, or add the tomatoes immediately.

You are not toasting them to brown; you are cooking out the raw taste. Their colour deepens slightly and the smell turns warm. Kashmiri chilli powder colours the dish a deep red with mild heat, and turmeric adds earthiness. Coriander powder thickens the sauce slightly. For more on each spice, see the Indian spices guide.

Garam masala is not part of this stage. It goes in at the end of the final curry, because its aroma fades with long cooking.

How do you cook the tomatoes until the oil separates?

Pour in the blended tomatoes or passata (not concentrated tomato purée or paste) and raise the heat to medium. Stir often, and scrape the base. The mixture will first look loose and wet, then thicken, then darken and begin to fry. This takes about 8 to 10 minutes for blended fresh tomatoes.

The cue you want is oil separation: oil seeps out and pools around the edges of the masala, and the base clumps together into a thick paste that moves as a mass when you stir. Other signs that it is ready:

• The colour has shifted from bright red to a deeper brick red.
• The sharp smell of raw tomato has gone, replaced by something sweet and savoury.
• A spoon dragged through the middle leaves a trail that does not fill straight back in.

If you stop before this point, the curry will taste sour and flat. If you go much beyond it, the masala starts to stick and darken, so add a splash of water and move to the next step.

What do you do after the base is ready?

For a single curry, add your protein, turn it in the base to coat, then add hot water and simmer. The chicken in the Punjabi chicken curry cooks for 25 minutes in 250 ml of hot water. Finish with garam masala and crushed kasuri methi, then taste for salt.

For a batch, skip the protein and go to the freezer, as below.

How do you batch-cook and freeze the base safely?

A batch saves time on a weeknight. This recipe makes enough for roughly three curries of four servings each. The yield is approximate, because it depends on how much water the onions and tomatoes lose.

Ingredient	Amount
Ghee or neutral oil	120 g
Cumin seeds	6 g
Onions, thinly sliced	1.35 kg
Ginger-garlic paste	67 g
Kashmiri chilli powder	15 g
Ground coriander	12 g
Ground turmeric	4 g
Fresh tomatoes blended smooth, or passata	900 g
Salt	9 g

1. Use a very wide pot, or work in two pans. An overcrowded pot steams the onions instead of browning them.
2. Follow the stages above. With this quantity, expect the onions to take 25 to 30 minutes and the tomato stage 15 to 20 minutes. Go by colour and the oil-separation cue, not the clock.
3. Leave out garam masala, kasuri methi, yoghurt, cream and any herbs. Add those when you cook each curry.
4. Divide into three equal portions, each enough for one four-serving curry. Use shallow containers or flat freezer bags, cool until the steam stops, and refrigerate or freeze within 2 hours.
5. Label with the date. Keep in the fridge for up to 3 days, or freeze for up to 3 months for the best flavour.
6. Thaw overnight in the fridge. Reheat in a pan until it is steaming hot all the way through. Reheat only once, and do not refreeze it once thawed.

When you use a portion, warm it in a pan, add the meat or vegetables, and simmer in hot water until cooked through. Chicken should reach at least 74°C (165°F) at the thickest part.

What goes wrong, and how do you fix it?

Problem	Likely cause	Fix
Curry tastes raw, sharp or sour	Tomatoes not cooked until the oil separated	Simmer uncovered 10 more minutes; a pinch of sugar can soften acidity
Bitter taste	Onions or garlic burnt, or ground spices scorched	Start again if heavily burnt; otherwise add a little yoghurt or coconut milk to balance
Pale, dull colour	Onions undercooked, or too little Kashmiri chilli	Cook the base longer; add Kashmiri chilli next time
Masala sticks to the pot	Heat too high or too little fat	Lower the heat, add a splash of water and scrape
Oil floats on top of the finished curry	Normal for a well-cooked masala	Skim with a spoon if you prefer, or stir back in
Gravy too thin	Too much water added	Simmer uncovered for 5 to 10 minutes; no thickener needed
Gravy too thick	Over-reduced	Stir in hot water, a splash at a time

How does each curry on this site use the base?

The technique scales up and down, and the same four stages appear in several recipes with different weights:

• Punjabi chicken curry is the full version: onions to deep golden in 12 to 15 minutes, ginger-garlic for a minute, ground spices for 30 seconds, blended tomatoes for 8 to 10 minutes until oil separates.
• Slow cooker lamb curry uses a shorter version in a separate pan: onions 8 to 10 minutes to soft and golden, spices, passata for 4 to 5 minutes until oil begins to separate. The slow cooker then handles the long simmer.
• Egg bhurji is the small, quick version: onion cooked to translucent and pale gold, then tomato and spices for 3 to 4 minutes until oil shows at the edges, before the eggs go in.
• Mutton yakhni pulao shares the onion-browning stage, but not the tomato: onions are fried golden in ghee and the pulao is built on a spiced stock and yoghurt instead.
• Oven paneer tikka is marinated rather than made with a bhuna. To turn paneer into a curry, simmer cubes of it in a portion of the base.
• Shakshuka is a global cousin: onion and pepper, then tomato cooked down with cumin and paprika, though it is not an Indian dish and the onions are only softened, not browned.

What should you cook next?

Make the Punjabi chicken curry once, paying attention to the cues above. Then read the spices guide for the order in which spices go into the pot, and the pantry guide for what to keep on the shelf.