Good question. I know that if you are just drawing on them with the sharpie markers they are not considered food safe. Since you are baking them and they are setting inside the glaze of the plate I have heard can be fine. I don’t think they are. Sharpie doesn’t promote them as food safe though. I would be using these more so for things like cupcakes and decorative. Maybe whole fruit or chips in the bowl. The items are handwash only so I don’t want to use food that would be tough to get off anyways.