Qingtuan (Green Mugwort Rice Balls)

Rooted in the Cold Food Festival tradition predating Qingming — when cooking fires were extinguished for three days, cold rice-flour cakes were prepared in advance. The Northern Song miscellany Suosui Lu (《琐碎录》) by Wen Ge records that Sichuanese people colored their cold-food rice green by steeping yangdong tree leaves, an early precedent. In the Jiangnan region, by the Ming dynasty these green rice balls had evolved into a named pastry eaten at ancestral offerings. By the Qing, Hangzhou and Suzhou teahouses listed qingtuan as a spring seasonal item, and the Suzhou almanac Qing Jia Lu (《清嘉录》) records street vendors crying 'green rice balls for sale' in the days before Qingming.

The crust is soft and gently sticky, with a mild vegetal sweetness from the mugwort and a faint herbal bitterness; the red bean filling is smooth and not cloying. Served cold, the whole thing is dense and satisfying in a way that warm pastries rarely are.

Mugwort juice is rich in chlorophyll, which remains stable in the mild alkaline environment of the glutinous rice dough during steaming, keeping the vivid green color. Glutinous rice starch is composed almost entirely of amylopectin (98–99%), which gelatinizes completely at 65–75°C, creating the characteristic soft, chewy texture. Unlike regular rice starch, amylopectin's highly branched molecular structure resists retrogradation, so the cakes stay tender even when served cold — a critical property for a festival food traditionally eaten at room temperature.