Lanzhou beef noodles: one clear, two white, three red

It starts with a thud. A rope of dough hits a floured counter, gets lifted, swung and stretched to the width of the cook's arms, then folded in half and stretched again. Each fold doubles the strands: two, four, eight, sixteen. In less time than it takes to read this paragraph, a single lump of dough has become a skein of noodles, dropped straight into boiling water.

That show, repeated for every bowl, is the heart of Lanzhou beef noodle soup, the signature dish of a city on the Yellow River in China's northwest. It is one of China's best-known noodle soups, and once you've seen it made, you understand why people stand and watch.

The pull

The noodles are lamian, which simply means "pulled noodles". The dough is wheat flour and water with an alkaline agent kneaded in, traditionally an ash called penghui (蓬灰) made from a desert plant, now often replaced by a commercial equivalent. The alkali is what lets the dough stretch so far without tearing, and it gives the noodles their spring and faint yellow tint. If that sounds familiar, it should: it is the same principle behind the kansui that makes ramen springy, explained in our piece on kansui.

Because the noodles are pulled to order, you choose the thickness. Shops typically offer a menu of widths, and the names vary from place to place, but you will usually find something like these:

• Hair-thin, almost as fine as vermicelli, delicate and quick to soften
• Thin and medium round noodles, the everyday choice
• Flat "chive leaf" noodles, narrow ribbons named for the leaves of garlic chives
• Wide and extra-wide noodles, broad belts with a serious chew
• At some shops, a triangular noodle with sharp edges

I think the medium widths are the best place to start. They hold the broth without overwhelming it, and they keep their bite to the bottom of the bowl.

Five colours in a bowl

Lanzhou beef noodles come with their own slogan, often repeated in China: one clear, two white, three red, four green, five yellow. It is a checklist for a proper bowl.

1. Clear: the broth, made from beef and beef bones simmered with spices, kept light and transparent rather than cloudy.
2. White: thin slices of white radish, cooked soft in the broth.
3. Red: chilli oil, floated on top, more fragrant than fierce when it is done well.
4. Green: chopped coriander and garlic shoots or scallions, scattered over the surface.
5. Yellow: the noodles themselves, tinted by the alkali.

Thin slices of beef complete the picture. The result is a bowl that looks almost painted: red oil over a clear broth, bright green herbs, pale noodles beneath. In Lanzhou it is also commonly eaten for breakfast, which I find entirely reasonable.

A Hui tradition

The dish is closely tied to the Hui, a Chinese Muslim community with deep roots in the northwest. Lanzhou beef noodle shops are traditionally halal, which is one reason the broth is built on beef and there is no pork in sight.

A Hui cook named Ma Baozi is often credited with shaping the modern bowl around the turn of the 20th century, though, as with most noodle origin stories, the details depend on who is telling them. What is not in doubt is how far the dish has travelled since. Signs reading "Lanzhou lamian" hang over noodle shops across China and well beyond, and in recent years Lanzhou-style shops have appeared in Japan too.

Lanzhou and ramen

Japanese readers may notice something about the word lamian. Ramen is sometimes written in Japanese with the characters 拉麺, the same ones used for pulled noodles in Chinese, and one popular theory traces the word "ramen" back to lamian, though other explanations exist. Either way, ramen grew out of the Chinese wheat noodle soups that came to Japan, a story told in our history of ramen.

The two have since gone very different ways. Ramen noodles are cut, usually by machine, and the broth is built for richness and depth. Lamian are pulled by hand in front of you, and the broth is all about clarity. If Japanese ramen is a carefully layered composition, Lanzhou beef noodles feel more like a clean, bright melody. For a different take on Chinese-style beef noodle soup, compare the braised bowls of Taiwan.

How to order

• Choose your width. The cook will usually want to know before pulling. Thinner noodles suit people who love broth; wider ones are for chewers.
• Ask about the chilli. Chilli oil is part of the classic bowl, but you can usually ask for less or more.
• Skip the herbs if you must. Not a coriander fan? Say so before the bowl is assembled.
• Look for extras. Many shops offer extra beef or an egg on the side.
• Eat it promptly. Fresh hand-pulled noodles soften as they sit, so the first few minutes are the best.

What stays with me about this dish is how much it gives away. The whole process happens in the open, from dough to bowl, and nothing about it is hidden: a clear broth, a handful of honest ingredients, and the cook's skill on display. It is a confident kind of cooking, the kind that has nothing to prove and lets you watch.