A Tale of Two Processes
The primary difference lies in how the oil is extracted. Cold-pressed oils, often known by the traditional name 'kachi ghani', are made by mechanically crushing seeds at low temperatures, without added heat or chemicals. This gentle process ensures the oil is as
close to its natural state as possible. In stark contrast, refined oils undergo an industrial process involving high heat and chemical solvents like hexane to maximize yield. This is followed by bleaching to lighten the colour and deodorising to remove any natural scent, which also strips away many of the oil's original compounds.
The Nutrient Advantage
Because they are minimally processed, cold-pressed oils retain a significant amount of their natural nutrients. They are rich in antioxidants, Vitamin E, and beneficial fatty acids like omega-3s that are naturally present in the seed. These compounds are known to support heart health and reduce inflammation. The high heat and chemical treatment used in refining, however, destroys a large portion of these delicate and beneficial micronutrients, leading to what many nutritionists consider an 'empty' fat, providing calories without the associated nutritional benefits.
Flavour and Aroma for the Perfect Tadka
A tadka, or tempering, is all about infusing the oil with the flavour of spices and then using that aromatic oil to finish a dish. Cold-pressed oils come with the inherent flavour and aroma of their source, be it the pungency of mustard, the nuttiness of groundnut, or the sweetness of coconut. This natural character enhances the tadka, adding a layer of complexity to dals and sabzis that a neutral-tasting refined oil simply cannot replicate. Refined oils are designed to be bland, which means they don't interfere with flavours, but they also don't contribute any of their own.
Debunking the Smoke Point Myth
A common argument for refined oils is their higher smoke point, the temperature at which an oil begins to break down and smoke. While refined oils do have a higher smoke point, making them suitable for high-heat deep frying, this is less of a concern for a tadka. A typical tadka is a quick process done over medium heat, with temperatures usually staying between 120°C and 160°C. Most cold-pressed oils, like groundnut (around 160°C) and sesame (around 177°C), have smoke points that are well within this range, making them perfectly safe and suitable for the task. The idea that cold-pressed oils are unsuitable for any heating is a myth; they are ideal for the everyday cooking that happens in most Indian homes.
A Return to Tradition
For many, the shift back to cold-pressed oils is also about reconnecting with tradition. These are the oils that have been used in Indian households for centuries, from ghee to mustard and coconut oil, each tied to a region's specific cuisine. The modern preference for cold-pressed oils represents a move away from industrially processed foods and a return to the wisdom of ancestral kitchens, prioritising natural purity and authentic taste. This growing consciousness is not just about health, but about preserving the culinary heritage that makes Indian food so diverse and flavourful.
