The first-known leavened bread made with semi-domesticated yeast dates back to around 1000 B.C. in Egypt, according to Miller. However, scholars debate the exact origin, as evidence suggests that Mesopotamians also produced yeast-risen bread, Rubel said.

How was leavened bread discovered?

The ancient Egyptians are credited with making the first leavened bread. Perhaps a batch of dough was allowed to stand before it was baked. Wild yeast cells settled in and grew, producing tiny bubbles of carbon dioxide and making the dough rise. ... The juice contained yeast from the skins of the grapes.

What is the oldest form of leavened bread?

Sourdough is the oldest and most original form of leavened bread, used by Ancient Egyptian civilizations as early as 4000 B.C. This fact has been proven by wall paintings and the analyses of desiccated bread loves.