Cake is a term with a long history and denotes a baked flour confection sweetened with sugar or honey; it is mixed with eggs and often, but not invariably, with milk and fat; and it has a porous texture from the mixture rising during cooking. It is not surprising that the frontiers between cake and bread, biscuit and bun are indistinct. The progenitor of all is bread in its simplest form. As techniques for baking and leavening developed, and eating patterns changed, what were originally regarded as froms of bread came to be seen as categories of their own and named accordingly. Certain Roman breads, enriched with eggs and butter, must have achieved a cake like consistency and thus approached one of these indistinct frontiers.