Both arrive cold, both come slicked in chili oil and vinegar, and both get translated into English as “cold noodles.” But liang pi (凉皮) and liang fen (凉粉) — also written liangpi and liangfen — are not variations on one dish. They are made by two completely different processes, and once you know what to look for you will never confuse them again.
The short version: liang pi is a sheet. A thin batter is spread into a film, cooked, peeled off in one piece, and sliced into ribbons. Liang fen is a jelly. A starch slurry is cooked until it thickens, poured into a basin, left to set solid, and then cut or scraped into strips. One is rolled out and cut; the other is set and carved. That difference is why they feel so unlike each other in the mouth — liang pi is springy and faintly chewy, liang fen is soft, slippery and wobbles on the chopsticks.
Liang Pi Is a Sheet
The defining step is forming a film. A loose batter — wheat starch, or rice flour, depending on the region — is poured into a shallow round pan, spread thin, and set over boiling water. It cooks in under a minute into a single translucent sheet, which is lifted off, brushed with oil, stacked, and then cut into wide ribbons with a knife.
In Xi’an the traditional vessel is a 铜旋子, a shallow copper pan with a slightly raised centre, about 35 centimetres across. The cook floats it on a pot of near-boiling water and spins it so the batter runs evenly to the edges. The spin is the whole craft: too slow and the sheet is thick and patchy, too fast and it tears.
Because the sheet holds together, liang pi has structure. The ribbons have body, they take a chew, and they hold sauce along their surface rather than absorbing it. Wheat versions come with a bonus: the gluten washed out during preparation is steamed separately into 面筋, spongy cubes served on top.
Liang Fen Is a Jelly
Liang fen starts from pure starch — mung bean most often, but also pea, broad bean, potato or sweet potato. The starch is stirred into water and heated until it gelatinises into a thick translucent paste, then poured into a basin and left to cool. What sets is a firm, faintly bouncy block, somewhere between a very stiff jelly and a soft cheese.
That block is then cut. In Sichuan it is sliced into thick strips or squares with a knife; elsewhere a 粉刮子, a scraper with a slotted blade, is dragged across the surface to shave off long ribbons in one motion. In Beijing there is a third method: the hot paste is pushed through a perforated gourd ladle straight into cold water, where each drip sets instantly into a short, tadpole-shaped noodle — 漏鱼, “leaked fish.”
That gourd ladle is the small end of a much older family of tools. Forcing a dough or batter through a drilled plate is how pressed noodles are made across northern China, and a sixth-century manual describes the die for it down to the width of the holes.
Because it never forms a sheet, liang fen has no grain and no chew. It is slippery, it breaks cleanly under a chopstick, and it soaks up sauce all the way through rather than carrying it on the surface. Sichuan’s 川北凉粉, cut thick and buried in chili oil, garlic and green onion, is the version most people meet first.
Unlike liang pi, which belongs squarely to Shaanxi, liang fen belongs to no single province. Almost every region makes a version and uses whatever starch is local — mung bean in the north, pea and broad bean in Sichuan and Hunan, potato on the plateau, buckwheat in Shaanxi and Shanxi. It is a method, applied everywhere, rather than a regional speciality that travelled.
One Name, Two Foods: A Note on Southern Liang Fen
This is why searches for liang fen turn up both chili-oil noodle bowls and sweet dessert cups. Everything above describes starch jelly, which is what liang fen means across northern China, Shaanxi and Sichuan. In Guangdong, Fujian, Guangxi and Taiwan the same two characters point at a different food altogether — a black herbal jelly, set from a plant rather than from starch, and eaten sweet rather than savoury. English usually calls it grass jelly, which is the sensible way to keep the two apart.
For the rest of this article, liang fen means the starch version. If what arrives is black, sweet and swimming in syrup,you are looking at the southern dessert, and it is a story for another day.
Same Bowl, Different Ancestors
The sheet method is old, and it is documented. The Qimin Yaoshu, a sixth-century agricultural manual from the Northern Wei, records a dish called 豚皮饼, “piglet-skin cake,” also known as 拨饼. The instructions are unmistakable: thin the flour with hot water until it is like a loose porridge; ladle it into a bronze bowl; float the bowl on boiling water and 以指急旋钵 — “spin the bowl rapidly with your fingers” — so the batter coats the sides. The cooked sheet is tipped into the water, boiled, then dropped into cold water. Jia Sixie’s verdict: 酷似豚皮 … 滑而且美 — it looks just like piglet skin, and it is slippery and delicious.
That is the copper-pan technique, described fifteen centuries ago, down to the spin. Scholars connect the entry to several of today’s rice-sheet foods rather than to liang pi alone, so the honest claim is not that liang pi is 1,500 years old — it is that the method behind it is, and that the family it belongs to has been documented since the sixth century.
Liang fen’s line runs elsewhere, and it surfaces clearly in the Song. The Dongjing Meng Hua Lu, Meng Yuanlao’s memoir of the Northern Song capital at Kaifeng, lists what the city’s summer stalls sold from their ice cellars. The two best-stocked stood outside the old Song Gate and served everything on silver: sugared mung beans, water-crystal soap-pods, cold yellow dumplings, foxnut pulp, iced pastry morsels — and 细索凉粉, “finely shredded liang fen.” By the early twelfth century, cold starch jelly cut into thin strands was already being sold beside the shaved ice in a city of a million people.
The setting-and-cutting method belongs to a broader family of starch jellies eaten across China, including buckwheat versions such as Beijing’s 扒糕 and the 荞面凉粉 of Shaanxi and Shanxi, which are grey-brown rather than clear.
How to Tell Them Apart in a Bowl
If the dish is already in front of you, three checks settle it:
- Edges. Liang pi ribbons have two flat faces and clean cut sides — they were sliced from a folded sheet. Liang fen has a uniform, slightly rough surface on all sides, or a rounded shaved edge.
- Translucency. Liang pi is opaque to milky. Liang fen is noticeably more see-through, closer to glass than to paper.
- Bite. Liang pi resists slightly and springs back. Liang fen yields immediately and breaks rather than stretches.
One more clue: if there are spongy beige cubes in the bowl, you are eating wheat liang pi. That is 面筋, the gluten washed out of the dough, and it never appears with liang fen.
Names You Will See on a Menu
Neither dish has one settled English name, and the Chinese names vary by region as well:
- 凉皮 liang pi — “cold skin.” Usually translated as cold skin noodles. In Xi’an it means the wheat version by default.
- 米皮 mi pi — “rice skin.” The rice-flour sheet, most associated with Qinzhen near Xi’an.
- 擀面皮 gan mian pi — a Shaanxi variant where the dough is rolled and steamed rather than poured, giving a much chewier ribbon.
- 凉粉 liang fen — “cold starch.” Translated as cold jelly noodles, starch jelly, or sometimes just jelly noodles.
- 扒糕 pa gao — the buckwheat jelly of northern China, darker and denser than mung bean liang fen.
- 凉粉 in the south — in Guangdong, Fujian and Taiwan, the same characters mean grass jelly, a different food entirely.
English menus flatten all of this into “cold noodles,” which is how the confusion starts. If you want the full picture of the sheet side of the family, see our guide to liang pi and its regional styles.
Frequently Asked Questions
Is liang fen the same as liang pi?
No. Liang pi is a thin sheet, cooked as a film and then sliced into ribbons. Liang fen is a starch jelly, set solid in a basin and then cut or scraped into strips. They are made by different methods and have different textures — liang pi is springy, liang fen is soft and slippery.
What is liang fen made of?
Pure starch and water. Mung bean starch is the most common, but pea, broad bean, potato and sweet potato are all used, and buckwheat gives the darker northern version known as pa gao. The starch is cooked until it gelatinises, then left to set. In southern China the same name refers to grass jelly, which is a different food.
Which province is liang fen from?
No single one. Unlike liang pi, which is firmly associated with Shaanxi, liang fen is made across almost all of China with whatever starch is local — mung bean in the north, pea and broad bean in Sichuan and Hunan, buckwheat in Shaanxi and Shanxi. The best-known named version is Sichuan’s 川北凉粉 from Nanchong, but the dish itself belongs to no one region.
What are liang pi noodles?
They are wide, flat ribbons cut from a thin cooked sheet, not extruded or rolled like ordinary noodles. The sheet is made from a loose wheat or rice batter spread thin and cooked over boiling water, then peeled off whole and sliced. They are served cold, dressed with chili oil, vinegar and garlic, and are a signature street food of Xi’an in Shaanxi province.
Is liang pi healthy?
The noodles themselves are low in fat and made from little more than starch and water, and the rice versions are naturally gluten-free — but the wheat version is not, and the gluten cubes served with it are pure gluten. Most of the salt, oil and heat comes from the dressing rather than the noodles, so it varies a great deal from stall to stall.
Which one is chewier?
Liang pi. Because it is formed as a continuous sheet, it keeps some structure and springs back when you bite it. Liang fen has no grain at all and breaks cleanly rather than stretching. The chewiest version of all is gan mian pi, a Shaanxi style where the dough is rolled before steaming.
Sources
This article draws on the following classical texts, cited from their original wording:
- Qimin Yaoshu 齐民要术, Jia Sixie 贾思勰, Northern Wei — chapter 饼法第八十二, entry 82.13 on 豚皮饼 (also called 拨饼)
- Dongjing Meng Hua Lu 东京梦华录, Meng Yuanlao 孟元老, Song — 是月时物, the sixth-month list of seasonal foods sold in Kaifeng