Patty Cake facts

While investigating facts about Patty Cake, I found out little known, but curios details like:

Before most people had ovens, you would make your baked item at home and bring it it the Baker's to bake it. You'd mark it specifically with a letter to differentiate it, and this was the origin of the nursery rhyme "Patty-cake"

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across. Here are 1 of the best facts about Patty Cake I managed to collect.