Urad Dal Flour
What it is
Flour from black gram (Vigna mungo) — the skinned, split bean is creamy white. A foundational ingredient of South Indian fermented batters. Gluten-free.
How it's made
Black gram is hulled, split, and milled. In tradition, though, urad is more often soaked and wet-ground with rice than used as dry flour.
Flavor profile
Mild, savory, slightly mucilaginous when wet.
Culinary uses
The protein engine of South Indian dosa and idli batter. Soaked urad dal is ground with soaked rice and left to ferment overnight; the urad provides the sticky globulin proteins and mucilage that trap fermentation gases (giving idli its fluffy sponge and dosa its crisp-edged lift) and help the wild fermentation along. Also vada (savory fried doughnuts), papad/papadum, and as a binding/crisping agent. The dal's natural viscosity is doing structural work that, in wheat, gluten would do.
Regional variations
South Indian idli/dosa/vada heartland; the urad-to-rice ratio and grind define regional batter styles. North Indian dal makhani uses whole urad as a pulse, not flour.
Cultural & historical context
The idli/dosa fermentation is an ancient, ingenious bit of food science — a naturally leavened, nutritionally complete (legume + grain) staple that predates and parallels other great fermentation traditions. Urad is the indispensable half of that pairing.
Reference notes
Tags: `legume`, `gluten-free`, `urad`, `black-gram`, `fermentation`. Related ingredients: [Chickpea Flour], [Regular Rice Flour]. Related cuisines: South Indian. Suggested links: → Idli & dosa fermentation, → Papadum, → Regular Rice Flour.