Cold infusion
Steeping spices in cool water, milk or oil to draw out gentle flavour without heat.
Also: cold steeping, soaking spices, saffron bloom, overnight steep
Cold infusion means soaking spices in room-temperature or chilled liquid for hours, rather than boiling. It extracts aroma and colour gently, without the bitter tannins or cooked notes heat can bring. Saffron is often steeped in a few spoonfuls of warm milk or water for 20 minutes before use, and cold-soaked overnight for a deeper colour. Tamarind pulp is soaked to soften, kokum petals are soaked for sherbet, and cold-brewed spiced teas use whole spices in cool water. Cooks also infuse oil, adding chillies or herbs and letting them sit. Because water-soluble and fat-soluble compounds extract differently, the carrier matters.