Nansha Sweet Filled Sesame Pastry

Nansha cake belongs to the family of Chengde pastries that emerged from the region's dual identity as a Qing imperial resort and a trade crossroads between Han agricultural heartlands and the Mongolian steppe. Local oral tradition holds that the pastry dates back more than five hundred years, predating the Qing, and that it was already established as a local specialty when the imperial court began using Chengde as its summer residence. Multiple Chengde local records note that Emperor Kangxi encountered the pastry during a hunting circuit through Pingquan (平泉), praised it effusively, and ordered it classified as a tribute food; thereafter, the imperial kitchens produced large quantities as travel provisions for Mongolian princes making the journey to Rehe. When palace demand exceeded the kitchen's capacity, local teahouses and pastry shops were contracted to supply the shortfall—this arrangement is what transformed the pastry from a palace speciality back into an accessible street food. The name 八勾糖饼 (Eight-Hook Sugar Cake) likely refers to the traditional folded-edge seal pattern used to close the dough around the filling.

A gentle press and the crust gives way with a dry, papery crack—inside, warm caramelised sugar and walnut pieces cascade out in fragments; the buckwheat in the shell adds a faint earthiness that keeps the sweetness grounded, and the candied citrus peel lifts the finish with a flash of bitter orange.

The pastry's characteristic shattering crispness comes from the interaction of buckwheat and wheat flours at the structural level. Buckwheat contains no gluten—its proteins do not form the elastic network that gives wheat dough its chew—so adding buckwheat to the dough deliberately weakens the gluten matrix, producing a short, friable crust. A ratio of roughly one part buckwheat to two parts wheat is enough to shorten the dough without making it too fragile to roll and fold. During dry-pan griddle cooking at around 180–200°C, the outer surface dehydrates rapidly and undergoes both Maillard browning and limited starch dextrinisation, locking the layers into a rigid shell. Inside, the sugar filling partially melts and caramelises—at around 160°C, sucrose hydrolyses into glucose and fructose, which brown faster and develop honey-like volatiles—while the walnut oils volatilise and diffuse into the dough layers, reinforcing the toasted aroma from outside.