How to Use Mustard Oil in Cooking: A Simple Guide

To cook with mustard oil the way Indian kitchens have for generations, heat it in a kadhai until it shimmers and just begins to smoke, then bring the flame down before you add your tadka or ingredients. That brief heating mellows the sharp, sinus-clearing pungency and settles the raw note in the oil; it is not about burning it, just taking the edge off. Mustard oil has a high smoke point of roughly 250 C, so it holds up beautifully to frying, tempering and high-heat sabzi where softer oils would break down. Use it for chhaunk, deep-frying pakoras, searing fish, sarson ka saag, aloo, and of course achaar. In India, mustard oil (sarson ka tel) is a permitted, everyday edible oil regulated by the FSSAI, so the short answer to can I cook with mustard oil is simply yes. The one habit that matters most is heating to that just-smoking point and then dropping the flame; get that right and mustard oil is as forgiving to cook with as any oil in an Indian kitchen.

Can you cook with mustard oil? Is it really used for cooking?

In India, absolutely. Mustard oil is one of the country's oldest everyday cooking oils and is regulated as an edible oil by the FSSAI. It is the everyday oil of Bengali, Bihari, Odia, Kashmiri and much of North Indian cooking, and it is used for tadka, frying, sabzi, pickles and marinades. So if you have ever wondered whether mustard oil is used for cooking, the answer here is that it is a culinary staple, not a novelty.

The confusion usually comes from abroad. Traditional mustard oil is naturally high in erucic acid (roughly 20-40%+ of its fat), and partly for that reason the U.S. FDA does not authorise mustard oil as a cooking oil for domestic sale; imported mustard oil there must be labelled "for external use only". The EU and Codex set limits on erucic acid in edible oils, and low-erucic-acid varieties exist. That regulatory position is a Western one, not an Indian one, which is why you may see the word "banned" attached to mustard oil online even though it sits on kitchen shelves across India.

Why is mustard oil heated before cooking, and how long?

Mustard oil is heated before cooking to mellow its raw, pungent bite. Fresh from the bottle it tastes sharp and grassy; a short blast of heat rounds that off and brings out the warm, nutty character that makes dishes like sarson ka saag and Bengali fish sing. Heat it on medium-high until it thins, shimmers, and you see the first faint wisps of smoke and the colour lightens slightly, usually a minute or two depending on quantity, then lower the flame and carry on. You are not trying to blacken it or fill the kitchen with smoke.

Should mustard oil be smoked before cooking? Traditionally many cooks do bring it just to smoking point once, then reduce the heat before adding jeera, hing or onions. It is customary rather than compulsory, and the purpose is taste, not safety. Just avoid heating it so hard that it darkens and turns acrid.

Can mustard oil be used for deep frying and tadka?

Yes. Its high smoke point of around 250 C is exactly why Indian kitchens reach for it for high-heat jobs, so mustard oil can be used for deep frying pakoras, kachoris, fish and samosas as well as for everyday tadka. It stays stable at frying temperatures where more delicate oils would smoke and break down early.

• Heat the oil to smoking point first, then drop the heat a notch before you start frying so the food cooks through without scorching.
• Fry in batches so the temperature does not crash; crowded oil makes soggy pakoras.
• Strain leftover frying oil once it cools and use it soon; do not deep-fry in the same oil repeatedly.
• For a quick tadka, heat the oil, add jeera or rai and hing, let them crackle, then pour it over dal or curd.

When should you use mustard oil in cooking?

Use mustard oil whenever you want its bold, pungent character to come through. It shines in the regional dishes built around it, in anything pickled, and in high-heat cooking. It is less suited to delicate bakes or mild desserts, where its strong flavour would take over. In everyday Indian food, that means:

• Fish and seafood, especially Bengali and Odia preparations like macher jhol and shorshe maach.
• Sarson ka saag, aloo gobi, baingan bharta and other robust North Indian sabzis.
• Every kind of achaar, where mustard oil is both flavour and a natural preservative barrier.
• Tadka for dals, kadhi and chaas, and marinades for tandoori and grilled dishes.
• Egg curries, kosha mangsho and other slow-cooked, deeply spiced gravies.

What are the benefits of mustard oil for cooking?

The clearest benefits of mustard oil for cooking are practical and compositional. It has a high smoke point, so it is well suited to frying and tempering; it carries and deepens spice flavour in a way milder oils do not; and it is naturally high in monounsaturated fat (MUFA), contains omega-3 ALA and omega-6 linoleic acid, and is low in saturated fat. Like all plant oils, it contains no cholesterol. As a fat, any cooking oil is calorie-dense, roughly 884 kcal and about 100 g fat per 100 g, per USDA FoodData Central, so portion still matters.

On health specifically, go easy on sweeping claims. Bodies such as Harvard's The Nutrition Source and the ICMR-National Institute of Nutrition generally encourage cooking oils higher in unsaturated fat and eating a variety of fats, and some research has looked at mustard oil's fatty-acid profile, but its high erucic-acid content is why regulators outside India treat it differently. Mustard oil is a food, not a medicine, and it does not cure, treat or prevent any disease. Traditional use and flavour are one thing; specific health effects are another, and the evidence there is mixed.

Heat it till it just smokes, then take the flame down. That one habit is the whole secret to cooking well with mustard oil.

Which mustard oil is best for cooking, and how to choose a brand?

For cooking, the best mustard oil is a kachi ghani (cold-pressed) one: the seed is crushed slowly at low temperature with no added heat, no solvents and no bleaching or deodorising, so the colour, aroma and the seed's natural compounds stay intact. That is what gives a good bottle its deep amber colour and clean pungency. Refined mustard oils are heat or solvent-extracted and then degummed, bleached and deodorised, which strips out much of that character. Rather than chase a single "best brand", it helps to know what a good one looks like.

• It says kachi ghani or cold-pressed on the label, not "refined".
• It carries a valid FSSAI licence number and clear batch and expiry details on the pack.
• It has a deep amber colour and a strong, sharp aroma when you open it.
• It is packed in food-grade or glass packaging and stored away from light and heat.
• The brand is transparent about sourcing rather than leaning on vague health promises.

Organikaly's own mustard oil is a cold-pressed yellow (kachi ghani) sarson ka tel made exactly this way, for cooks who want that traditional pungency and single-seed simplicity. Whatever you choose, buy a size you will finish in a few months and keep it capped, cool and out of direct sunlight so it stays fresh.

A quick note: this article is general food information, not medical or dietary advice. If you have a specific health condition, are pregnant, or are choosing oils for a baby or young child, please consult a qualified doctor or dietitian, and a pediatrician for infants. Some guidance also cautions against applying mustard oil to a newborn's skin, so check with your pediatrician before using it that way.