Can I just say that I spent way too much time doing this? And that I enjoyed it way too much.
All you need is permanent markers, and a ceramic mug. (And of course, your oven.)
Trust me, I used a lot of Windex. 🙂
It took me awhile, but I finally finished a design I liked! Once done, place the mug on a cookie sheet and put it in your oven. Then set the temperate to 350*F (do not wait for the oven to ‘preheat’ before placing your mug in there, put it in there right away!) Once the oven gets to 350*F leave the mug in there and ‘bake’ it for 30 more minutes.
Turn the oven off after the 30 minutes, and wait until the mug is cool before taking it out.
I will probably end up making more! 🙂