What Is Kachi Ghani Mustard Oil, and How Is It Made?

Kachi ghani mustard oil is mustard oil made the traditional Indian way — sarson seed crushed slowly, at low temperature, in a ghani (an oil press), with no added heat, no chemical solvents, and no bleaching or deodorising. The phrase kachi ghani roughly means "cold press": kachi for raw or uncooked, ghani for the crushing mill. Because the seed never gets hot and nothing is stripped out, the oil keeps its deep golden-amber colour, its sharp pungent aroma, and the natural compounds that give mustard oil its character. It is the same thing people mean by cold-pressed mustard oil. Nutritionally it is high in monounsaturated fat (MUFA), carries some omega-3 (ALA) and omega-6 (linoleic acid), is low in saturated fat, and — like every plant oil — contains no cholesterol (per USDA FoodData Central). In an Indian kitchen it is prized for tadka, achaar, frying and pickling, thanks to its high smoke point and unmistakable flavour.

What is mustard oil, and where does mustard come from?

Mustard oil is the edible oil pressed from mustard seeds — the tiny seeds of the mustard plant, a member of the Brassica (cruciferous) family that also gives us sarson ka saag, rai and cabbage. The seed most Indian oil comes from is sarson. When people ask where does mustard come from, they usually mean where it's grown, and the answer is the mustard belt across northern and eastern India — Rajasthan, Uttar Pradesh, Haryana, Madhya Pradesh, Punjab and West Bengal — where it's a cool-season rabi crop with a long history in the region's kitchens. Mustard also grows in temperate climates around the world.

So where is mustard oil from? In practice, most of the mustard oil on an Indian table is pressed close to where the seed is grown, which is part of why it became such a regional staple — abundant local seed, and a press in almost every town.

How is kachi ghani mustard oil made? (mustard oil kaise banta hai)

Kachi ghani mustard oil is made by mechanically crushing cleaned mustard seed in a ghani — an oil press — slowly and at low temperature, so friction never heats the seed enough to damage it. No external heat, no solvent, no refining. The oil that runs off is allowed to settle and is filtered, and that's essentially it. In Hindi, mustard oil kaise banta hai has a simple answer: seed goes in, it is pressed cold, and oil comes out.

• Cleaning: the seed is winnowed and cleaned of dust, stones and chaff.
• Cold pressing: it's crushed in a ghani or expeller — or the older kolhu / bail ghani, a wooden mortar-and-pestle once turned by bullocks and now usually by a motor — with friction kept low so the temperature stays low.
• Settling and filtering: the raw oil is left to settle and is filtered; nothing is bleached or deodorised.

"Wood-pressed" oil, and terms like kolhu or bail ghani, all point to that same low-heat wooden-press method. Kachi ghani, cold-pressed and wood-pressed describe unrefined, low-temperature extraction rather than one particular machine. And can you make mustard oil at home — how do I make mustard oil? Realistically, no. Pressing oil needs a ghani and a fair quantity of seed; it's a job for a mill, not a kadhai. For most people, "how to make mustard oil" ends sensibly at buying a good cold-pressed bottle.

Kachi ghani, cold-pressed, virgin, unrefined — is mustard oil refined or not?

It can be either — it depends which bottle you pick up. Kachi ghani (cold-pressed) mustard oil is unrefined and effectively "virgin": pressed once, filtered, with nothing added or removed. Refined mustard oil is a different product — typically extracted with heat and/or solvent for higher yield, then degummed, bleached and deodorised, which lightens the colour and mutes the smell. So "is mustard oil refined or not" has no single answer; you have to read the label. Unrefined, virgin, cold-pressed and kachi ghani are broadly the same idea, while refined is the opposite.

Kachi ghani, cold-pressed, virgin and unrefined all point to the same thing: mustard oil pressed once, gently, and left alone.

The trade-off is character versus neutrality. Kachi ghani keeps the aroma, colour and natural compounds of the seed; refined trades that character for a milder taste and a longer shelf life. Neither is "fake" — but if you're cooking Bengali, Bihari or classic North Indian food, or making achaar, the unrefined oil is usually the point.

Yellow or black mustard oil — which is which?

Two different things get called "colour" here — the seed and the oil. Seed-wise, yellow (or white) mustard is milder, while brown/black mustard (rai) is sharper and more pungent; a lot of Indian kachi ghani oil is pressed from yellow and brown sarson. Oil-wise, good cold-pressed mustard oil is a clear, deep golden-amber — which is exactly what people mean when they search yellow mustard oil — while very dark oil usually comes from darker seed or from blends.

Black mustard oil, then, tends to be pressed from black or brown seed and reads as more pungent and peppery. Colour alone doesn't prove quality: a bright, clear golden oil with a strong aroma is the classic sign of good yellow kachi ghani, but shade varies with seed, season and pressing. If you're choosing between yellow and black, it's more about the flavour you want than about one being "better" than the other.

How does mustard oil taste and smell?

Mustard oil has a bold, unmistakable character — sharp and pungent when raw, with a peppery, sinus-clearing bite and a warm, nutty depth underneath. That pungency comes from natural compounds (chiefly allyl isothiocyanate) released when the crushed seed meets moisture. Raw, it can taste almost hot, which is why the classic Indian technique is to heat the oil until it just begins to smoke — mustard oil has a high smoke point, around 250°C (about 480°F) — so the raw sharpness mellows before you add your tadka. Cooked, it turns rounder, savoury and slightly sweet: the backbone of a lot of eastern and northern Indian cooking, and a big part of why achaar tastes the way it does.

Cold-pressed mustard oil benefits, erucic acid and the "is mustard oil banned" question

By composition, mustard oil is high in monounsaturated fat (MUFA), carries some omega-3 (ALA) and omega-6 (linoleic acid), is low in saturated fat, and contains no cholesterol — as USDA FoodData Central lists for the oil, and as is true of all plant oils. Cold-pressing retains the aroma compounds that refining strips out, which is part of why cold-pressed mustard oil benefits get talked about so much. It's worth separating tradition from proof, though: mustard oil is traditionally used across Indian kitchens and home remedies, and researchers have studied its fatty-acid profile, but everyday health claims should be treated as general information rather than settled medical fact.

One factual point matters here. Traditional mustard oil is naturally high in erucic acid — roughly 20–40%, sometimes more, of its fat. Because of that erucic-acid content, the U.S. FDA does not authorise mustard oil as a cooking oil for domestic sale: imported mustard oil in the US must be labelled "for external use only" and is not recognised as safe (GRAS) for use as a food oil. The EU and Codex likewise set erucic-acid limits in edible oils, and low-erucic ("double-zero" / canola-type) mustard varieties exist. This is the real source of the "is mustard oil banned" question. The key context for Indian readers: in India, mustard oil is a permitted, everyday edible oil regulated by the FSSAI and a culinary staple — the "ban" is a US and some-Western regulatory position, not an Indian one.

A note, because this is your health: the above is general information, not medical advice. For anything specific to you — including during pregnancy — talk to a qualified doctor or dietitian before changing what you eat or use. And for babies, some guidance cautions against putting mustard oil on a newborn's skin, so please check with your pediatrician before using it for infant massage.

Which mustard oil is better, and what makes a quality kachi ghani oil?

For traditional Indian cooking — tadka, frying, achaar, and Bengali and Bihari dishes — cold-pressed kachi ghani mustard oil is usually the one cooks reach for, because the flavour, aroma and golden colour survive intact and the high smoke point suits high-heat cooking. Refined mustard oil is milder and more neutral if that's what you prefer. So "which mustard oil is better" really depends on the dish — but for character, kachi ghani wins. Here's what a quality kachi ghani oil tends to look like:

• A strong, pungent aroma and a clear, deep golden colour.
• "Kachi ghani" / cold-pressed / wood-pressed stated plainly on the label — not "refined" or "blended".
• Single-source pressing from mustard seed, rather than a blend of oils.
• FSSAI-regulated and honestly labelled.
• A little natural settling or fine sediment, which is normal for unrefined oil.

If you want to go deeper before you buy, the reads below cover how cold-pressed and refined differ, how to spot a pure oil, and how to choose well. Organikaly's own mustard oil is kachi ghani, cold-pressed from mustard seed — if that's what you're after, you can find it in the store.