I have an order for 200 cupcakes with a vages theme. I have made dice out of chocolate clay and now need to know the best way to color in the number indentions. I have tried writing pens. They don't work so well on chocolate. If I use color gel will it dry and will it bleed into the frosting on the cupcakes?

Take the back of a paint brush..about the size you need for the dot and dip in black gel color and make the dots...you can only do 3 sides at a time while it dries and then flip it and do the remailing dots.