Found this tutorial on making truffles on Debbie's Tiny Treasures. It was too good to keep to myself! So, in Debbie's words, here are the instructions ...
First off you need some Sculpey Mold Maker.
Then some Peppercorns, yes I did say Peppercorns.
Roll out some of the mold maker, be careful because it's very sticky. Then pop it in the fridge until it's cold.
Get a small container and put in either Corn Flour or Talc, tip in some Peppercorns and stir, so that the peppercorns are coated.
Get the mold maker out of the fridge, make sure it feels firm to the touch and press in the coated Peppercorns and then pop them out with a pin.
Bake the mold maker for the correct time then remove from the oven and allow to cool.
Before using the Mold, brush with a little water and then press in small balls of clay and release.
Make as many as you want, then bake for the recommend time. You should now have convincing little Truffles.