Shanghai, China; attributed to Huang Mingxian of Nanxiang, c. 1871; xiao long bao became synonymous with Shanghai culinary identity in the 20th century.
Xiao long bao — the delicate soup dumplings of Shanghai — are among the most technically demanding preparations in Chinese cuisine and among the most transcendent to eat. Each dumpling contains a meatball surrounded by hot soup inside a thin, pleated wrapper that has been pinched closed with 18 folds — the mark of a skilled dim sum artisan. The soup is not added as liquid: it begins as a solid aspic made from pork skin gelatin, which is incorporated into the filling and melts into liquid during steaming. The eating ritual — pick up gently, take a small bite to release steam, sip the soup, eat the dumpling — is as much part of the dish as the cooking. At home or in a restaurant kitchen not equipped for the labour-intensive production of xiao long bao, the challenge is threefold: making a thin enough wrapper without tearing, making the gelatin-rich aspic filling, and executing the 18-fold pleating. Mastery requires practice — but the result justifies every attempt.
The aspic is the foundation: pork skin or pig's trotters simmered 3 hours with ginger and Shaoxing wine until gelatinous; cooled, diced fine, and mixed with the filling Wrapper dough is hot-water dough (half boiling water, half cold) — this gives elasticity without toughness and produces the characteristic thin, translucent wrapper Roll wrappers thin — 1–2mm — and thinner at the edges; the pleating area needs the most thinness for clean folds Pleat immediately after filling — dough dries quickly and becomes impossible to pleat once dry Steam on parchment or cabbage leaves — the wrappers stick to bare bamboo even with oil Eat within 30 seconds of serving — xiao long bao cannot be held; the wrapper softens and the soup leaks quickly
The professional aspic uses a combination of pork skin and chicken feet for clarity and flavour depth — chicken feet produce a cleaner gelatin For first attempts, use a slightly thicker wrapper — accept less delicacy in exchange for intact soup at service until pleating technique is developed The 18-fold pleat is the mark of quality — fewer folds mean thicker pleated areas; practise the fold pattern with a piece of dough before attempting the filled version
Insufficient gelatin in the filling — a poorly set aspic means no soup inside; the gelatin ratio is not approximate Thick wrappers — xiao long bao with thick wrappers are doughy and the filling ratio is wrong Over-filling — the filling expands during steaming; too much filling means the wrapper tears Too much moisture in the filling before wrapping — the aspic should be the only liquid; wet filling tears wrappers Over-steaming — 7–8 minutes maximum; longer produces thick, gummy wrappers and over-cooked filling