We had a painting party for my daughter's birthday, and instead of a cake, she wanted cookies shaped like artists' palettes. Well, we were able to find a couple of cookie cutters online, but I was worried they wouldn't arrive in time unless we paid exorbitant amounts for rush delivery. We experimented a bit and found that a clean tape dispenser would give us a passable palette shape.
We baked them for 2 minutes less than the usual cooking time and took them out of the oven. As you can see, they've spread out a bit. I used the bottom of an icing decorating tip to recreate the hole by pressing down firmly and giving just a bit of a twist.
Then, the cookies were put back into the oven to finish baking. After they cooled off, we popped out the hole, and the kids decorated.
We used gel icing tubes to make paint splotches. The paintbrushes are pretzel sticks with a wad of Fruit Roll-Ups at the tip, and they are attached with just a dab of icing. Tah-dah!