"This chocolate dough can be rolled out like a fondant, or molded to form roses, leaves or whatever. It's very simple to make, and quite impressive. This can also be made with white chocolate."
Melt chocolate in a large metal bowl over a pan of simmering water. Stir occasionally until smooth. Remove from heat, and stir in the corn syrup. The mixture will become sticky, but keep stirring until very well blended.
Spoon onto a piece of plastic wrap, and wrap tightly. Let stand at room temperature until firm before using. Overnight is best. Use unsweetened cocoa powder on work surfaces to prevent sticking.