Pan-Indian; dry roast method dominant North and West; wet grind method dominant South and East coastal
Coriander (Coriandrum sativum) is India's highest-volume ground spice and the technique of its preparation profoundly shapes the final dish. Dry-roasting and grinding produces a warm, slightly smoky, nutty powder suited to North Indian masalas and dry rubs. Wet grinding — soaking overnight and stone-grinding with water — produces a fine green-grey paste with fresh citrus brightness and a raw pungency found in South Indian curries and the base pastes of Chettinad, Kerala, and coastal Karnataka. The two preparations are not interchangeable: a Chettinad masala built with dry-ground coriander lacks the paste's texture and volatile citrus; a North Indian bhuna uses dry-ground for the fragrance it releases in hot oil.
Dry-ground coriander forms the base of most North Indian masalas alongside cumin. Wet coriander paste is the base of South Indian fish curries, kootu, and Chettinad preparations.
{"Dry roast coriander seeds in a dry pan on medium heat until the colour shifts to light tan and the seeds smell nutty — approximately 3 minutes","Do not roast past tan to brown — over-roasted coriander turns bitter and loses the fresh citrus note","For wet grinding, soak seeds for minimum 4 hours in cold water before stone or blender grinding","Stone grinding produces finer particle size than blenders — the paste is silkier and distributes better through coconut-based curries","Freshly ground dry coriander is incomparably more fragrant than pre-ground — buy whole seeds and grind as needed"}
In Chettinad and Kerala kitchens, the coriander for curry paste is often combined with the coconut in the final grinding stage rather than ground separately — the fat in the coconut emulsifies the spice paste and creates a smoother, more cohesive texture that clings to protein rather than floating in the sauce.
{"Storing pre-ground coriander in open containers — the volatile oils responsible for citrus freshness evaporate within weeks","Over-roasting to a dark brown — produces only bitterness","Using dry-ground coriander in pastes for wet South Indian curries — the texture is grainy and the flavour wrong"}