Deep-fried glutinous-rice balls rolled in white sesame, started in a cool pot so they balloon hollow, crisp outside and stretchy-chewy within, usually filled with sweet red-bean or lotus-seed paste. A staple of the Cantonese dim sum cart and a New Year good-luck food.
Sesame balls predate the dim sum trolley by centuries. A round fried-rice cake called luodui or jiandui was eaten as a refined snack at the Tang court; the early-Tang monk-poet Wang Fanzhi names the oil-fried jiandui in verse, comparing his craving for it to a craving for jackfruit. Carried south by migrating northerners, it took root in Guangdong as one of the classic youqi, the fried New Year goods. Qu Dajun's Ming-Qing record of Cantonese life, Guangdong Xinyu, describes locals filling the cakes with popped glutinous grain and offering them at the altar and to guests — the ancestor of today's crackling-rice filling. Northern China keeps plainer cousins it calls matuan or maqiu, while Wuhan fries a close relative named huanxituo.
A craggy golden sphere about the size of a small fist, the whole surface armored in toasted white sesame. The shell shatters with a dry crackle, then the teeth meet a thin, translucent skin of glutinous dough that stretches before it gives, faintly sweet. Inside is mostly air, a hollow dome, with the red-bean paste pooled at the bottom — warm, dense, just sweet. The sesame is the dominant flavor, roasty and nutty, and a well-fried ball is greaseless, the oil steamed back out of the puffed crust.
Two things make a sesame ball work: why the dough turns chewy rather than crumbly, and how it inflates hollow. The chew is starch chemistry. Glutinous ("waxy") rice is almost pure amylopectin — about 98 percent, against the roughly 2 percent straight-chain amylose of ordinary rice. Amylopectin's heavily branched molecules trap water and tangle into a soft, cohesive, elastic gel rather than the firm, sliceable network amylose builds, so the cooked dough stretches and clings instead of breaking; there is no gluten present. The hollow is physics. The ball starts in cool-to-medium oil, about 150°C, never a hot pot. The outer dough gelatinizes into a sealed, pliable skin; trapped water flashes to steam, and the vapor pressure inflates the ball from within. The cook presses it against the side of the wok repeatedly — each press flattens it and the trapped steam springs it back larger, walking the wall thinner and the cavity wider. Only at the end is the oil pushed hotter to set and crisp the shell. A ball dropped straight into hot oil sets rigid before the steam can expand it: it stays dense, or the locked-in pressure blows it apart. The sesame toasts in the oil, its sugars and amino acids running the Maillard reaction into the nutty, roasty pyrazines that are the coating's point.
Variations
Cantonese sesame balls split into two famous schools from neighboring towns. Jiujiang jiandui (from Nanhai) is the country's only flat sesame ball — a hollow disc of pure glutinous-rice dough, thin-skinned and crackling-crisp, prized locally as bo-bo-cui. Longjiang jiandui (from Shunde), begun in the Ming dynasty, is the round fist-sized version, its dough cut with non-glutinous rice flour and its hollow stuffed with popped rice, fried peanuts and sugar syrup. Standard dim sum sesame balls are round and filled with red-bean or lotus-seed paste. Beyond Guangdong the dish multiplies under other names: matuan and maqiu across the north and Jiangnan (often solid or red-bean filled), mayuan in the northeast and Sichuan-Chongqing, youdui in Guangxi, and Wuhan's huanxituo. New Year batches are made plump and rolled round, in line with the rhyme that has them tumbling gold and silver into the house.
On the Palate
Where Sesame Balls sits in the Chinese flavor cloud
Ingredients
Serves 4
How it's made
8 steps · 45 min active + 45 min waiting
- 110 min
Make the filling ahead: divide red-bean (or lotus-seed) paste into 12 g balls and chill so they hold shape.
- 25 min
Make a hot-water roux starter: whisk a small portion of the glutinous rice flour with just-boiled water until it forms a sticky cooked paste — this keeps the dough soft for hours.
- 320 min
Combine the rest of the glutinous rice flour, wheat starch and sugar, add the roux and warm water, and knead to a smooth, pliable, non-sticky dough; rest 15 minutes.
- 412 min
Divide into ~40 g pieces, flatten each, seat a paste ball in the center and seal completely into a smooth ball with no cracks.
Watch outSeal the seam completely with no crack — the smallest gap lets oil rush in and the ball bursts in the fryer instead of puffing.
- 58 min
Roll each ball over a damp cloth, then over white sesame seeds, pressing firmly so the seeds embed and won't pop off in the oil.
- 63 min
Heat oil to about 150°C (medium-low) and gently lower in the balls; do not crowd.
Watch outStart in only warm oil, around 150°C — too hot at the start sets the shell before it can inflate, leaving it solid and heavy.
- 710 min
As they float, repeatedly press each ball against the side of the pot with the back of a ladle and let it spring back — this walks the shell thin and inflates the hollow.
Watch outPress each floating ball against the pot and let it spring back, again and again — that pumping is what walks the shell thin and blows the hollow open.
- 85 min
Raise the heat at the end to crisp and color the shells to deep gold, drain, and serve hot.
