Understanding naked oat flour
Youmian is flour milled from youmai, also known as naked oats. Here, mian first refers to flour; it does not mean the ingredient must become long noodles. Datong Evening News lists local forms including wowo, yuyu and jiaojiao. Kaolaolao provide an accessible introduction to steamed oat flour foods: small upright rolls sit together, leaving honeycomb-like openings.
This food is found across Shanxi and neighboring regions and should not be described as unique to Datong. The photographs in this article were taken in Beijing and Hohhot to illustrate the same food's rolled shape, arrangement and sauces; their captions retain the locations. They are not photographs of dishes from a Datong restaurant and do not establish the portions or presentation used by local businesses.
Thin sheets rolled into small tubes
To make kaolaolao, dough is pressed into thin sheets, rolled into small tubes or cup-like shapes, arranged in a steamer and steamed. Looking at a finished basket, start with the edges of the sheets, then see how the rolls fit closely together. They are not long noodles folded into a basket: each begins as an individual rolled sheet. This helps distinguish them from other preparations such as youmian yuyu.
Steamed kaolaolao have a grain aroma and some chewiness, while their hollow shape lets sauce enter the rolls. There is no need to break up the whole basket. Pick up a few rolls with sauce, try the plain flavor first and then adjust the amount of sauce. Texture varies with the thickness of the sheets, steaming and serving temperature; the name youmian does not imply that every preparation is the same.
Sauces shape the meal
A basket of oat flour rolls is commonly eaten with sauce. A tomato topping can bring a sweet-sour flavor, while meat broth or other toppings create different savory combinations. Restaurants have their own preparations. When ordering, ask whether sauce comes with the staple and whether it is intended for dipping or pouring before deciding on extra dishes. This is more useful than judging the meal solely by the size of the steamer.
When sharing, you can start with one basket and decide after tasting whether to add other flour-based dishes. Datong's oat flour foods extend beyond kaolaolao. Menu names such as yuyu and wowo may describe different shapes and cooking methods. If you want the honeycomb-like rolls, show staff the dish name or a menu photograph rather than simply asking for youmian.
Dietary restrictions require ingredient checks
A dish based on naked oat flour does not necessarily meet strict vegetarian or gluten-free requirements. Sauces may contain meat broth, minced meat, soy sauce or other seasonings, and the kitchen may also handle wheat flour. People with celiac disease or anyone who must strictly avoid an ingredient need to confirm ingredients, seasonings and cross-contact conditions with the restaurant. The oat ingredient alone is not enough to judge suitability.
When choosing this dish while traveling, focus on its grain ingredient, steamed form and sauces rather than treating it as a health food. Some introductions emphasize nutrition or satiety, but those claims do not amount to medical benefits for an individual diner. For a first try, begin with a moderate amount and choose accompaniments that suit your habits rather than ordering a large spread based on promotional claims.
Useful official references
Check the relevant official service before making arrangements. These links are references, not a guarantee of current services.
