Origin of Doughnut

Youliang (油条) should be the innovation of deep-fried noodle food after the Southern Song Dynasty. According to the Song History, during the Song Dynasty, Qin Hui persecuted Yue Fei, and the people expressed their anger by deep-frying a kind of noodle food similar to deep-fried doughnuts (deep-fried hinoki). The origin of similar deep-fried noodle dishes is much earlier than the Song Dynasty and can be traced back to before the Tang Dynasty, the exact period of which cannot be verified.

Expanded Information

Doughnut is a bar-shaped food made of flour as the main ingredient, with the right amount of water, salt and additives, after mixing, pounding, tucking, waking up and deep-frying. Currently, most areas of the doughnut contains a large amount of aluminum, fat, carbohydrates, part of the protein, a small amount of vitamins and minerals such as calcium, phosphorus, potassium, is a high-calorie, high-fat food.

The traditional way of eating doughnuts is to sandwich burritos with soy milk, if the quality of protein, soy milk is rich in Iysine (Iysine), but the lack of potassium thiamine (Methionine), while the doughnuts, burritos is just the opposite of the two can complement each other.

Reference:

Baidu Encyclopedia - Doughnuts