Sugar-oil dumplings are round glutinous-rice balls fried slowly in brown-sugar syrup until they are glossy red-brown, then rolled in toasted white sesame and skewered on a bamboo stick — a classic Chengdu street snack. Hand-rolled balls of glutinous-rice dough are lowered into warm oil, then brown sugar is added and the balls are turned constantly so they color evenly, swell, and often hollow out inside. Each one comes out shiny and amber, crisp-shelled and caramel-scented, soft and chewy within. Bright but not cloying, they were once the great snack of Chengdu's spring flower fairs.
Sugar-oil dumplings are a traditional Chengdu snack, counted among the "three wonders of Qingshiqiao," the old market street. They go by the older names jiao-dui and "swan egg," the latter for their rounded shape. Fried sweet dough-balls are an old food in China: jiao-dui is recorded as a fritter as far back as the Tang and Song, and the Tang vernacular monk-poet Wang Fanzhi already wrote of craving "oil-fried dui" — so the snack is usually said to descend from that lineage, though a direct unbroken line to the Chengdu sweet cannot be firmly proven. In old Chengdu it was at its liveliest at the spring flower fairs, where people strolled among the blossoms and lanterns eating skewers of the dumplings. It remains a fixture of Chengdu's snack streets, sweet-skinned and crisp, fragrant and soft within without being greasy.
The shell cracks thin and crisp under the teeth, glazed in a lacquer of brown-sugar syrup that is glossy and just short of burnt, carrying a deep caramel scent. Inside is hot, soft, chewy glutinous rice that pulls a little as you bite, and the best-fried ones are hollow, a thin chewy wall around an airy center. The toasted sesame adds a dry, nutty crackle over the sticky-sweet. Eaten warm off the skewer, it is sweet and rich but stops short of cloying; left to cool, the shell softens and the chew firms.
Glutinous-rice flour is almost entirely amylopectin, with very little amylose, which is why the cooked dough turns sticky, translucent and chewy when its branched starch gelatinizes. The dumplings are fried gently, not hot and fast: at a low oil heat the surface starch sets into a firm skin before the inside is fully cooked, and the moisture trapped within flashes to steam, whose pressure pushes the soft interior outward against the set shell so the ball swells and hollows. Constant turning, and the cook repeatedly pressing the floating balls under with a skimmer, is what keeps them round and coaxes out the hollow center. Then brown sugar is added straight to the oil; it melts and caramelizes against the dumplings, the sucrose and its molasses browning into the glossy red-brown lacquer and caramel aroma, while the heat is briefly raised at the end to set the color to a deep amber. Toasted sesame is rolled on last for nutty contrast and to keep the sticky balls from clumping.
Variations
The canonical form is brown-sugar-fried and sesame-coated, hollow if well made; some are made solid, and fillings of red-bean paste or rock-sugar turn up in newer versions. The same balls appear nationwide as plain hollow "sesame fried balls," but the Chengdu sugar-oil style is defined by frying the balls in brown-sugar syrup rather than glazing them after. It should not be confused with Hunan's tang-you-baba: those are flat patties of glutinous-rice dough fried and coated in brown sugar, not the round, sesame-rolled, skewered balls of Chengdu. Within Sichuan it is sold alongside the city's other glutinous-rice sweets — san-da-pao and pearl balls — at snack streets and fairs.
On the Palate
Where Sugar-Oil Dumplings sits in the Chinese flavor cloud
Ingredients
Serves 4How it's made
7 steps · 35 min active + 25 min waiting
- 110 min
Mix glutinous-rice flour with warm water (and a little plain flour if you like) into a smooth, firm dough; rest it briefly.
- 28 min
Pinch off small pieces and roll between the palms into even round balls.
- 312 min
Heat oil to a low, gentle frying temperature and lower the balls in; fry slowly, pressing them under with a skimmer so they float, swell and hollow.
Watch outFry in low, gentle oil and press the balls under with a skimmer — a slow heat sets the skin while the trapped steam pushes the inside out so the ball swells and hollows; hot-and-fast just browns the outside and leaves them dense.
- 44 min
When the balls are floating and puffed, add brown sugar straight into the oil and stir constantly so they coat evenly.
- 54 min
Keep turning as the sugar melts and caramelizes onto the balls, raising the heat briefly at the end to set a glossy red-brown color.
Watch outAdd the brown sugar straight into the oil and stir nonstop — it should melt and caramelize evenly onto every ball; stop stirring and it clumps and scorches in spots.
- 62 min
Lift out and drain, then roll the hot balls in toasted white sesame to coat.
- 71 min
Thread several onto a bamboo skewer and eat warm.
