Did noble ladies bake? Interesting question, which probably depended on the date and the location. Because, and you might be surprised to learn this, the word "lady" originally meant "bread-maker":
"Lord" was likewise "bread-guarder":
In other words the aristocracy arose from people who were able to literally put bread on the table. It's not inconceivable that at some point in history, the noblest ladies were the hardest kitchen workers!
I wouldn't be surprised if fancy baking became trendy among later iterations of the distaff nobility (think Marie Antoinette playing at peasant life), but I cannot say!