The lentil batter is traditionally ground on a wet stone rather than a machine, until it turns light and aerated enough to fry into a doughnut-shaped ring instead of a dense, heavy fritter.
Soaked black gram (urad dal) is ground into a thick paste, seasoned, hand-shaped into a ring, and deep-fried until dark and crisp outside but fluffy within, sold hot from Little India's Tekka Centre stalls with coconut chutney.
Why it's made this way: Vadai has roots stretching back to Sangam-era Tamil literature, and South Indian migrants carried the snack to Singapore, where it became one of Little India's standard tea-time and breakfast street foods.
Roughly what's in it
250kcal
6gprotein
25gcarbs
14gfat
Estimated per typical street-vendor portion — not lab-tested.