The Ghani: India’s Traditional Oil Press and the Story of Kachi Ghani Mustard Oil

When we think about the quality of mustard oil, our attention often goes to the seed. Yet, the journey from seed to bottle is just as important. The method of extraction determines not only the oil's flavour and aroma but also how much of the seed's natural goodness is retained.

For centuries, India relied on one simple yet ingenious technology to extract oil from mustard, sesame, groundnut and other oilseeds: the ghani. Known by different names across the country, including kolhu and chekku, the ghani was the heart of village oil production. More than a traditional machine, it represented a philosophy of slow, careful extraction that respected the seed's integrity.

Today, while the technology has evolved, this philosophy lives on through Kachi Ghani Mustard Oil, an extraction method that preserves the authentic character of mustard oil while meeting modern standards of quality and food safety.

Cold pressed method being used at Puri Oil Mills Limited

The Ghani: A Legacy of Traditional Oil Extraction

The ghani has been part of India's agricultural and culinary heritage for centuries. Historically, it consisted of a large wooden or stone mortar with a vertical pestle, powered by bullocks walking in a circular path. Mustard seeds were crushed slowly under continuous pressure, allowing oil to separate naturally from the seed.

Unlike modern high-speed extraction systems designed for maximum output, the ghani operated in small batches and at a much slower pace. While this made production less efficient, it offered an important advantage: the seeds were subjected to significantly lower temperatures during extraction.

This seemingly simple difference had a profound impact on the quality of the oil.

Why the Method of Extraction Matters

Mustard seeds are naturally rich in beneficial fats, antioxidants and bioactive compounds. However, these components are sensitive to how the oil is processed.

When oil is extracted using high temperatures or undergoes extensive refining, some naturally occurring compounds responsible for flavour, aroma and nutritional value can be reduced. The objective of traditional ghani extraction was not merely to obtain oil but to preserve as much of the seed's natural composition as possible.

This is the principle behind Kachi Ghani, which literally translates to "cold-pressed in a traditional manner." Although modern Kachi Ghani systems use mechanical equipment rather than animal-driven presses, they continue to operate under controlled conditions that minimise excessive heat generation during extraction.

Kachi Ghani Mustard Oil: Preserving the Goodness of Mustard Seeds

Mustard oil is valued not only for its distinctive pungency but also for its nutritional profile. The seeds naturally contain a combination of healthy fats and antioxidants that contribute to their appeal.

A carefully controlled Kachi Ghani extraction process helps retain many of these naturally occurring components, including:

• Monounsaturated fatty acids (MUFA), which form a significant portion of mustard oil's fat composition.

• Polyunsaturated fatty acids (PUFA), including naturally occurring Omega-3 (alpha-linolenic acid) and Omega-6 fatty acids.

• Natural tocopherols (Vitamin E), which act as antioxidants and contribute to the oil's stability.

• Phytosterols, naturally present plant compounds found in vegetable oils.

• Volatile flavour compounds, including allyl isothiocyanate, which gives traditional mustard oil its characteristic pungent aroma.

It is important to note that these nutrients originate in the mustard seed itself. The extraction process does not create them. Rather, a gentle, minimally processed approach helps preserve more of the seed's natural composition compared with processes involving intensive refining.

More Than Nutrition: Preserving Authentic Flavour

Anyone who has cooked with authentic Kachi Ghani Mustard Oil recognises its unmistakable aroma. That sharp, earthy fragrance is not an added flavour. It is a natural characteristic of mustard seeds that develops during crushing and is retained through careful extraction.

This is why Kachi Ghani mustard oil remains the preferred choice for many regional cuisines across India. From Bengali fish curries and Bihari chokha to Rajasthani pickles and Punjabi saag, the flavour of mustard oil has become inseparable from the dishes it defines.

The extraction process plays a vital role in preserving these sensory qualities, ensuring that the oil reflects the true character of the seed.