Coriander Seed Grinding — Wet vs Dry Technique (धनिया पिसाई)

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.