Bánh cốm (Hanoi green rice-flake cake with mung bean filling)
When the new crop of young glutinous rice comes in, in early autumn, Hanoi smells of cốm: green, flattened rice flakes from the village of Vòng. The shops on Hàng Than street press them into bánh cốm, square cakes that are still carried as betrothal gifts in their paper wrappers. The outside is soft, chewy and jade green, tasting faintly of grass and pandan; the inside is a mellow paste of mung bean and coconut. Serve them at room temperature with green or lotus tea. Bánh cốm is naturally egg-free: a hot sugar syrup and a spoonful of tapioca starch turn the rice flakes into a sticky mass that binds itself, and the mung bean paste is bound by its own starch. Use frozen or dried cốm from an Asian grocer; soak dried flakes briefly first. Chef's tip: the common mistake is cooking the cốm too hard; stop as soon as it pulls together into a sticky ball, or the cakes go rubbery when cool.























