In Shanghai’s bustling Old City, few snacks carry the warmth of nostalgia quite like Lei Sha Yuan (擂沙圆) – a delightful twist on the classic tangyuan (glutinous rice dumplings) that has been satisfying local sweet tooths for over 70 years. Often described as a “dry” tangyuan, this traditional treat offers all the chewy, soft goodness of its soup-bound cousin, but with a brilliant difference: it comes without the broth, making it portable, shelf-stable, and equally delicious hot or cold.
From a Street Vendor’s Ingenuity to a Culinary Icon
The story of Lei Sha Yuan begins in the late Qing dynasty, in the Sanpailou area of Shanghai’s old walled city. According to local lore, an elderly woman surnamed Lei ran a small tangyuan stall. At the time, tangyuan could only be served fresh in a bowl of hot soup – they couldn’t be taken away or stored for later. To expand her business, Lei experimented with various ways to preserve her dumplings. She first tried coating them in dry rice flour, then tested other powders. Eventually, she discovered that rolling the cooked dumplings in roasted adzuki bean powder worked best.
The bean powder gave the tangyuan a fragrant red coating, removed the need for soup, and allowed customers to carry them home or eat them cold. The dumplings became an instant hit, and locals named them Lei Sha Yuan – “Lei’s Sand (or Powder) Balls” – in honour of their creator.
The Qiaojiashan Connection
Lei Sha Yuan might have remained a humble street snack, but fate had bigger plans. In 1909, a tangyuan shop called Yongmaochang (永昌茂) opened on Qiaojia Road in Shanghai’s old town. The shop sat near a bridge with wooden railings – known locally as “Qiaojia Shan” – and the name stuck. The shop later evolved into Qiaojiashan Restaurant (乔家栅食府), which became one of Shanghai’s most celebrated time-honoured brands.
In the 1930s, Qiaojiashan began mass-producing Lei Sha Yuan and refined the recipe. The restaurant sieved the adzuki bean powder through a fine 17-mesh screen to make it smoother, and after rolling the cooked dumplings in the powder, the finished product turned a beautiful purple-red colour. Qiaojiashan also changed the name from Lei Sha Yuan to Lei Sha Yuan (with a different character for “lei”, meaning “to grind” or “to roll”) – a nod to the process of rolling the dumplings in the powder.
Today, Lei Sha Yuan is one of Qiaojiashan’s “Ten Famous Snacks,” alongside tangyuan, zongzi (rice dumplings), and eight-treasure rice pudding. In 2006, Qiaojiashan was recognised as a “China Time-Honoured Brand” by the Ministry of Commerce. In 2015, the restaurant’s pastry-making techniques – including Lei Sha Yuan – were inscribed on Shanghai’s Municipal Intangible Cultural Heritage list. The snack has even been demonstrated at the China International Import Expo by master artisans.
What Makes Lei Sha Yuan So Special?
The beauty of Lei Sha Yuan lies in its simplicity – and its attention to detail.
The bean powder is made from “Dahongpao” adzuki beans (a prized variety from Shanghai’s Chongming Island). The beans are cooked until soft, ground into a fine paste, pressed to remove moisture, and dried in the sun for two to three days. When needed, the dried bean paste is stir-fried over low heat for about 30 minutes, then ground again and sieved through a 17-mesh screen. The result is a fine, fragrant, golden-brown powder known as lei sha fen (ground sand powder) – which must be used fresh, as it loses its aroma over time.
The dumplings themselves are made from glutinous rice flour and filled with a variety of sweet and savoury fillings – red bean paste, black sesame, or minced pork being the most common. The cooked dumplings are drained of all liquid and rolled in the adzuki bean powder until evenly coated.
The finished Lei Sha Yuan is a study in contrasts: the soft, chewy, glutinous rice wrapper gives way to a rich, fragrant filling, while the slightly gritty, sweet bean powder adds texture and a deep, nutty aroma. It’s fragrant, soft, and delightfully chewy – and because there’s no soup, you can enjoy it hot or cold, making it a perfect snack for any season. As one local saying goes: “Hot, it has a rich red bean fragrance; cold, it offers a completely different flavour.”
A Taste of Shanghai’s Culinary Heritage
Lei Sha Yuan is more than just a snack – it’s a taste of Shanghai’s culinary ingenuity. It represents a moment when a resourceful street vendor found a clever solution to a practical problem, and a century-old restaurant elevated that idea into a beloved classic. In 2021, Qiaojiashan’s intangible cultural heritage inheritors demonstrated the craft of making Lei Sha Yuan at the China International Import Expo, bringing this century-old snack to a global audience.
For visitors to Shanghai, a bite of Lei Sha Yuan offers a connection to the city’s past – to the narrow lanes of the old town, the bustling street stalls, and the generations of Shanghainese who grew up with this humble, ingenious treat. It’s a snack that proves sometimes the simplest ideas are the most enduring – and the most delicious.
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