Traditional Oil Extraction: Why Your Grandmother's Method Was Better for the Planet

The Oil on Your Kitchen Shelf Has an Energy Story

Every bottle of oil in your kitchen represents a journey - from seed to press to shelf. But here's what most labels won't tell you: the method used to extract that oil determines how much energy was burned, how many chemicals were involved, and how much of the oil's natural goodness survived the process.

In India and across traditional food cultures worldwide, oil was extracted using wooden churns, stone mills, and hand-operated ghanis for thousands of years. These methods were slow, gentle, and remarkably energy-efficient. Today, modern industrial extraction has largely replaced them with high-heat, high-pressure, solvent-based processes that produce more oil faster - but at a significant cost to nutrition, the environment, and your health.

At House of Daadi, we've gone back to the roots. Here's why that matters - not just for your health, but for the planet.

What Is Traditional Oil Extraction, Really?

Traditional oil extraction refers to methods that have been used in Indian and global food cultures long before industrialisation. The core principle is simple: apply mechanical pressure to oil-bearing seeds or nuts to release their natural oils - without heat, chemicals, or artificial solvents.

The Main Traditional Methods

1. Wooden Ghani (Kachi Ghani / Cold Press)

A wooden pestle rotated by bullocks or manually grinds oilseeds at a controlled, low speed. The friction stays minimal, temperatures stay below 40°C, and the oil retains its original colour, aroma, and nutrition. This is the gold standard of traditional Indian oil extraction.

2. Stone Mill Pressing (Chakki)

Stone mills crush seeds through slow, consistent pressure. Used widely across South Asia for sesame, coconut, and groundnut oils. The stone surface naturally absorbs excess heat during pressing, keeping extraction temperatures low without any mechanical cooling.

3. Hand-Operated Wooden Churn (Mathani / Bilona)

For ghee and certain oils, the traditional hand-churning method remains the most prized. Low RPM, minimal heat generation, maximum nutrient preservation. The bilona method for ghee, in particular, is associated with the highest quality A2 butter fat extraction.

4. Traditional Coconut Oil Extraction

In coastal India and Sri Lanka, grated coconut milk is naturally separated through gravity, gentle sun exposure, or minimal heating - no chemical intervention at any stage. The resulting virgin coconut oil carries full lauric acid content and the natural fragrance of fresh coconut.

How Traditional Methods Compare to Industrial Extraction

This is where the energy story becomes undeniable. When you place traditional cold-pressing alongside modern industrial refining, the difference in energy input, chemical use, and nutritional output is dramatic.

Energy Consumption: A Real Comparison

Reference sources: Food and Agriculture Organisation (FAO) oilseed processing guidelines; ICAR research on traditional oil extraction methods in India.

The difference is stark. Industrial solvent extraction - the dominant method for most commercial oils sold in India - requires substantially more energy at every stage. Beyond extraction itself, the oil must then be degummed, neutralised with sodium hydroxide, bleached with activated earth, and deodorised using high-temperature steam stripping. Each of these steps consumes significant heat energy and generates industrial byproducts requiring careful disposal.

The Environmental Cost of Industrial Oil Refining

When you buy a mass-market refined sunflower or soybean oil, you're buying the end product of one of the most chemically intensive food processes in the industry. Here's what that looks like from an environmental standpoint.

1. Hexane Solvent Use and Atmospheric Emissions

Most industrial oil extraction in India and globally uses n-hexane, a petroleum-derived solvent, to maximise oil yield from seeds. While hexane is recovered and reused in the process, a portion evaporates into the atmosphere during each production cycle. Hexane is a Volatile Organic Compound (VOC) and a known contributor to local air pollution. It is also classified as a neurotoxin. Solvent residues in finished oils, though regulated, remain a concern for health-conscious consumers.

2. Water Consumption at Scale

Refining one tonne of crude vegetable oil requires between 500 to 1,000 litres of water depending on the specific refining process used. Traditional cold pressing uses negligible amounts of water - only what is naturally present within the seed itself.

3. Industrial Effluent and Solid Waste

The neutralisation stage of oil refining produces soapstock - a chemical byproduct that requires treatment before safe disposal. The bleaching stage generates spent bleaching earth contaminated with oil residues and adsorbed impurities. These are significant waste streams with no equivalent in traditional cold-press operations.

4. Higher Greenhouse Gas Intensity

The cumulative energy input of solvent extraction combined with full multi-stage refining consistently results in a higher carbon footprint per litre of finished oil compared to cold-pressed production from the same seed. This holds true when accounting for transportation of crude oil to centralised refineries, energy for heat processes, and waste treatment infrastructure.

Why Traditional Cold Pressing Is the Smarter Energy Choice

The core environmental argument, stated plainly: traditional oil extraction - particularly wooden ghani and stone mill cold pressing - operates on a fraction of the energy input required by industrial refining, and produces a nutritionally superior oil with no chemical residue.

What Cold Pressing Does Not Require

• Solvent procurement, heating, or recovery systems

• Multi-stage chemical refining infrastructure

• High-temperature deodorisation towers

• Wastewater treatment and effluent management plants

• Long-distance transportation of crude oil to centralised refineries

A traditional ghani or expeller press can be powered by a small electric motor, a pair of bullocks, or even a human operator. In rural India, many small-scale cold-press operations run on 1–3 kW of electricity per session - a fraction of what industrial facilities consume for the same seed input.

When production stays local - seeds sourced regionally, pressed without chemicals, bottled in small batches and distributed directly - the full lifecycle carbon footprint can be significantly lower than oils transported as crude to large refineries, processed intensively, and then distributed nationally through cold storage chains.

This is the model House of Daadi operates on: small-batch, regional sourcing, cold-pressed extraction, and minimal processing from seed to bottle.

What "Cold Pressed" Actually Means on a Label - And What It Doesn't

Not every "cold pressed" label means the same thing. The Indian market has seen a surge in brands using the term loosely. Here's how to read it correctly.

House of Daadi Tip: Look for oils that clearly state the extraction temperature, the seed source region, and the specific pressing method - not just marketing claims on the front label.

The Nutrients That Traditional Extraction Preserves

This isn't only about energy efficiency. The reason traditional extraction matters to your family's health is what survives - or doesn't survive - the extraction process.

What Heat and Chemicals Destroy

• Vitamin E (tocopherols) - Critical antioxidants that are significantly reduced at temperatures above 80°C. Cold-pressed oils retain their full natural tocopherol content.

• Polyphenols - Protective compounds with well-documented anti-inflammatory properties, largely destroyed in high-heat processing.

• Natural plant sterols - Compounds that support heart health and are found naturally in seeds, but removed during refining.

• Omega fatty acids - Delicate unsaturated fats that oxidise and transform into harmful compounds under sustained high heat.

• Natural aroma compounds - The distinctive fragrance of fresh sesame or groundnut oil that signals genuine cold-pressed quality.

• Lecithin (phospholipids) - Beneficial natural emulsifiers removed during industrial degumming, present in full quantity in cold-pressed oils.

Cold-pressed oils retain most of these compounds intact. That is why House of Daadi's cold-pressed groundnut oil carries the deep, roasted aroma of real groundnuts - and why our sesame oil delivers the warm, nutty depth that refined sesame oil simply cannot replicate regardless of its price point.

The Indian Context: Why We Lost the Ghani

India has one of the world's richest traditions of oilseed cultivation and artisanal oil pressing. Until the mid-20th century, local ghanis - often operated by a designated community oilpresser, known as a Teli - were the primary source of cooking oil for most Indian households. Each region pressed its traditional oil: groundnut in Gujarat and Maharashtra, coconut in Kerala and coastal Karnataka, mustard in Bengal and Bihar, sesame across South India and Rajasthan.

The shift happened rapidly after independence. Industrial oil mills were promoted for yield maximisation, national food security goals, and economic efficiency at scale. Local ghanis could not compete on price or volume. By the 1980s and 1990s, most urban Indian households had switched entirely to refined packaged oils sold in plastic pouches and tin cans.

What Was Lost in That Transition

• Variety: Each region's signature oil, matched to the local cuisine and climate, was replaced with generic refined sunflower or soybean oil.

• Freshness: Cold-pressed oil was pressed within days of seed harvest. Refined oil may sit in industrial pipelines and storage tanks for months before bottling.

• Nutrition: Refining stripped out the beneficial compounds that had been considered natural and essential parts of the Indian diet for centuries.

• Ecological balance: Local ghanis supported regional seed economies, small farms, and short supply chains without the need for long-distance logistics.

The good news is that India is experiencing a meaningful revival of traditional cold pressing, driven by health-conscious consumers, Ayurvedic medicine advocates, and brands like House of Daadi who have made it their mission to bring these methods back into everyday kitchens.

Sustainable Sourcing: The Farm-to-Press Difference

Energy efficiency in oil production is not only about the pressing method. It also starts with where the seeds come from and how they are grown.

Industrial oils often use seeds grown in large-scale monoculture systems with heavy synthetic fertiliser and pesticide inputs. The full environmental cost of that cultivation is rarely included in standard energy or emissions comparisons. Traditional cold-pressed producers, by contrast, typically work with smaller regional farms, heritage seed varieties adapted to local soils, fewer external chemical inputs, and shorter supply chains with lower transport emissions.

How the oil is stored and packaged also matters. Refined oils are often stored for months in large metal tanks under controlled atmospheres before bottling. Cold-pressed oils, at their best, are pressed in small batches and bottled within a short window of production. Less industrial cold storage means less energy consumed and greater freshness delivered to the customer.

House of Daadi sources directly from farming communities, presses in small batches, and delivers to customers within a short window of production. That full-chain approach is what makes the energy and environmental benefit real - not just theoretical.

Which Oils Are Best Suited for Traditional Cold Pressing?

Almost all culinary oilseeds can be cold-pressed. These are the most nutritionally valuable options and the ones with the deepest roots in Indian culinary tradition:

• Groundnut (peanut) oil - Rich in monounsaturated fats and Vitamin E. One of the most stable cold-pressed oils for Indian cooking.

• Sesame (til) oil - High in sesamin, sesamol, and unique lignans with documented antioxidant properties. Deeply embedded in South Indian and Rajasthani cuisine.

• Mustard oil - Contains allyl isothiocyanate, ALA omega-3 fatty acids, and strong natural antimicrobial compounds. Essential in Bengali, Bihari, and Kashmiri kitchens.

• Coconut oil - Cold-pressed virgin coconut retains full lauric acid content and medium-chain triglycerides (MCTs) associated with metabolic health benefits.

• Flaxseed (alsi) oil - Extremely high in alpha-linolenic acid (ALA omega-3). Must be cold-pressed to preserve its sensitive fatty acid structure.