The Cold-Pressed Difference
Before we get into specifics, what does “cold-pressed” actually mean? It refers to the method of oil extraction. Traditional wooden or stone mills (known as 'ghani' or 'chekku') crush seeds at low temperatures without using external heat or chemical solvents.
This gentle process ensures the oil retains its natural flavour, aroma, colour, and, most importantly, its nutritional profile, which is often compromised during the high-heat refining process. Refined oils are processed with heat and chemicals to create a neutral, stable product, but this strips away the very essence that gives regional dishes their character. Cold-pressed oils are less processed, offering a taste that is true to the seed from which it came.
Mustard Oil: The Pungent Powerhouse
Known for its sharp, pungent aroma and robust flavour, cold-pressed mustard oil, or 'sarson ka tel', is the heart of many North and East Indian cuisines. It’s a non-negotiable ingredient in Bengali dishes like Shorshe Maach (mustard fish curry), Punjabi winter classics like Sarson Ka Saag, and the spicy pickles of Uttar Pradesh. The oil's distinctive pungency comes from a compound called allyl isothiocyanate, which mellows upon heating. For this reason, many traditional cooks heat the oil until it just starts to smoke to soften its bite before adding other ingredients. Its relatively high smoke point makes it suitable for sautéing, tadkas, and frying everything from fish to pakoras.
Sesame Oil: The Nutty Elixir of the South
Travel south, and the culinary landscape shifts to the warm, nutty notes of cold-pressed sesame oil, often called 'gingelly oil' or 'til ka tel'. An absolute staple in Tamil Nadu, Andhra Pradesh, and Karnataka, this oil imparts a distinct, earthy flavour that is crucial for dishes like sesame rice, various chutneys, and tempering for sambar and other dals. It's important not to confuse it with the dark, toasted sesame oil used in East Asian cooking; Indian sesame oil is pressed from raw seeds, resulting in a lighter golden colour and milder flavour. With a moderate smoke point, it’s ideal for tempering spices, stir-frying vegetables, and dressing podis. Its natural antioxidants also make it surprisingly stable for frying traditional snacks like murukku.
Groundnut Oil: The Versatile Favourite
Cold-pressed groundnut oil, with its mild, sweet, and nutty flavour, is perhaps the most versatile of the trio. It is a kitchen staple across Western and Southern India, particularly in Gujarat, Maharashtra, and Karnataka. Its less assertive flavour profile allows the spices and main ingredients of a dish to shine, making it an all-purpose cooking medium. With a smoke point of around 160°C, it is well-suited for everyday cooking methods like sautéing sabzis, preparing curry bases, and shallow frying. While some sources suggest it can be used for deep frying at controlled home temperatures, others recommend refined oil for sustained high-heat cooking.
Making the Right Choice at the Store
When buying cold-pressed oils, let your senses and the label be your guide. A pure oil should smell and taste like the seed it came from—mustard should be sharp, sesame nutty, and groundnut earthy. Look for labels that explicitly state "cold-pressed," "wood-pressed," "kacchi ghani," or "chekku". Pure oils are often housed in dark glass bottles to protect them from light, and they may appear slightly cloudy or have sediment at the bottom, which is a natural characteristic. A very low price can be a red flag, as the cold-pressing method yields less oil and is more labour-intensive. Check for FSSAI certification and a clear batch number for added assurance of quality.
