According to scientists, this is the recipe for the world's oldest bread, dating back more than 14,000 years.
The bake would have looked like a flatbread and tasted a bit like today's multi-grain bread, they say.
Our ancestors may have used the bread as a wrap for roasted meat. Thus, as well as being the oldest bread, it may also have been the oldest sandwich.
"This is the earliest evidence we have for what we could really call a cuisine, in that it's a mixed food product," Prof Dorian Fuller of University College London told BBC.
Until now, the oldest evidence of bread came from Turkey 9,000 years ago.
The latest find, from an archaeological site in the Black Desert in Jordan, pushes back the first evidence for bread-making by more than 5,000 years.
Scientists uncovered two buildings, each containing a large circular stone fireplace within which charred bread crumbs were found.