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The simplest product form of biscuit is only a mixture of flour and water, which was found in ancient Egyptian tombs around 4000 BC. The truly shaped biscuits can be traced back to Persia in the 7th century, when the sugar-making technology was just developed and was widely used because of biscuits.
Until the tenth century, with the Muslim conquest of Spain, biscuits spread to Europe, and then spread in various Christian countries. By the14th century, biscuits had become the favorite snack of all Europeans, and the fragrance of biscuits spread from the royal kitchen to the streets where civilians lived.
Modern biscuit industry began in Britain in the19th century because of advanced navigation technology. During the long voyage, bread was not suitable as reserve grain because its water content was as high as 35% and 40%, so a kind of bread biscuit with low water content was invented.