Wine-Lees Cold Chicken

The zao (lees-marinated) tradition traces to pre-Qin drinking culture, its earliest written mention in the Chu Ci (《楚辞》). By the Southern Song dynasty, Hangzhou street markets sold zao-marinated pork heads, fish, and crabs as a standard method for preserving fresh protein in humid summers. Yuan Mei's 随园食单 (c. 1792) recorded home recipes for 糟鸡 alongside 糟肉 and 糟鲞, evidence of its widespread presence in Qing literati kitchens. In Shanghai, the venerable 老人和 restaurant — reputed to have been established in the Jiaqing period (c. 1800) before the treaty-port opening — set the benchmark, its recipe calling for five-year aged Huadiao wine, Datong zao sediment, and a compound of multiple spices. Each summer, demand outpaced supply across the city.

Cold, silky chicken that yields at the lightest pressure; the lees brine has drawn out excess surface fat while depositing a layered fragrance — floral and yeasty from the Huadiao, faintly herbal from star anise and cassia — that lingers well past the last mouthful. Best eaten in humid midsummer heat.

Rice wine lees (香糟) — the solids left after Huadiao production — are concentrated in esters, chiefly ethyl acetate and ethyl propanoate, that bind to fat-soluble flavour receptors. A 5-8% saline brine drives osmotic dehydration of surface proteins, expelling excess fat while compressing surface tissue so the chicken firms up without drying. Residual ethanol in the lees relaxes myofibril bundles, allowing ester molecules to migrate deeper into muscle tissue. Marinating at 6-8°C slows bacterial growth while maintaining diffusion velocity; 8-12 hours achieves full flavour saturation without over-salting.