While there doesn’t seem to be a definitive reason, food historians offer a couple theories for cake’s roundness:　

1.It just kind happened.　　　　

As we found out in a previous post, cake most likely evolved from the making of bread. And ancient bread was typically molded by hand into round balls, which naturally relaxed into rounded shapes when baked.Some food historians think the round shape originated from this early bread making technique and just sort of got passed along through the centuries.　　　　　

Not the most exciting origin story but a probable explanation nonetheless.