Thanks for posting this, OP! I found some DIYs online. Some use sharpies and dishwasher safe Modge Podge... I'm not sure about eating off of a Modge Podged surface, tbh. There are other tutorials that show how to decorate just the outside and bake the dish in the oven to set it. I'm not sure if it's dishwasher safe. I might try the non Modge Podge option.
https://theminimalishmama.com/2012/07/tutorial-dishwasher-safe-sharpie-mugs.html