The rice is often studded with black beans or peanuts, and the bamboo's thin inner membrane peels away with the rice, leaving it wrapped in a papery skin.
Glutinous rice is mixed with coconut milk, grated coconut, sugar, and a pinch of salt, packed into a length of green bamboo, and roasted slowly over an open flame until the rice inside turns tender and faintly smoky. Vendors — often women balancing baskets on bicycles — split the charred bamboo open to order and sell it by the tube for about a dollar.