Why does the yeast dough rise?

Preparing homemade pastries often involves making yeast dough, which is then set aside in a warm place to rise. Have you ever wondered why yeast dough actually rises?

The process of yeast dough rising is caused by the formation of gas bubbles inside the dough. This gas is released as a result of alcoholic fermentation caused by yeast. During fermentation, the sugars contained in the dough are converted into alcohol and carbon dioxide, which forms the gas bubbles. The dough filled with gas bubbles increases in volume, which is why yeast dough rises. A higher temperature speeds up the fermentation process, which is why dough set aside in a warm place rises faster.


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