Bread is alcohol-free. However, we cannot rule out the following situations that may cause the bread to contain alcohol. The use of raw materials containing alcohol, now making a lot of bread will use wine or alcoholic beverages, such as red wine raisin toast, the raisin will be processed with dry red; for example, some bread will use brandy, rum and so on. The use of these ingredients may cause the bread to contain alcohol. Bread is generally non-alcoholic, but do not rule out the following situations will cause the bread contains alcohol. 1, the use of raw materials containing alcohol now make a lot of bread will use wine or alcoholic beverages, such as red wine raisin toast, that raisin dry will be used to dry red treatment; for example, there are some bread will be used brandy, rum and so on. The use of these raw materials may make the bread contains alcohol. 2, fermentation problems as we all know, the bread is the use of yeast fermentation, yeast consumption of sugar, carbon dioxide, can be formed in the bread inside the porous puffy tissue. However, it should be noted that the yeast in the anaerobic state, the metabolites have alcohol. 3, process control issues bread is directly into the mouth of things, so the bread factory is very much attention to environmental hygiene and disinfection, 75% of cooking alcohol is a kind of disinfectant will be often used frequently. If the process is not well controlled, alcohol may still be mixed into the product. Extended information on the earliest origins of bread in ancient Egypt, the legend says that around 2600 BC, there was an Egyptian slave who made cakes for his master with water and flour, and one night, the cakes were not baked he fell asleep, and the stove went out. During the night, the raw flour cakes began to ferment and puff up. By the time the slave woke up, the loaf was twice as big as it had been the night before. He hurriedly shoved the loaf back into the oven, thinking that no one would know that he had fallen asleep before his work was done. The loaf was baked, fluffy and soft. Perhaps the flour, water, or sweetener in the raw pastry had been exposed to wild yeast or bacteria in the air, and when they had been warmed for a time, the yeast grew and spread throughout the pastry. The Egyptians continued to experiment with yeast and became the world's first professional bakers. Later, the method of bread making was brought back to Europe and to this day it is an essential staple food for Europeans. It is generally believed that Western-style bread was introduced to China around the end of the 19th century, however, the basic method of making bread - fermentation - is something that has existed in China since ancient times. The Romance of the Three Kingdoms tells the story of Zhuge Liang who, after capturing Meng Huo and pacifying the southern barbarians, was blocked from crossing the river by the ghosts of those who had died in battle. Zhuge Liang face this scene is anxious, think about it had to sacrifice to the river god, ask the god of blessings and punish the devil, bless the living, Zhuge Liang can not bear to use human head sacrifice, and invented steamed bread as a substitute. So ordered to kill the cow slaughter pig, wrapped into dough, cast in the water to show the offering. Later, the folk used this custom, which is probably the origin of "steamed bread". "Steamed bread" through the "brute", "steamed bread" that means "brute head".