I wish I could give credit, but I don't remember who first suggested this:
1. Buy a bunch of grapes and remove the grapes, keeping the stem intact. Think of this as your tree (bare, stem down).
2. If you want, you can use wire to shape the branches or you can snip some out if it's too full.
3. Paint on melted chocolate or, if you have a bowl of melted chocolate, dip the grape cluster "tree" in it. Wait for the chocolate to dry and then insert the stem of the grape cluster wherever you want the tree. Make sure it's anchored (more melted chocolate?) and won't fall over.
4. "Glue" (melted white chocolate colored green - make sure it's oil-based coloring - or green candy melts your "leaves" on. These can be a few shades of green (or other colors, as you want) gumpaste or fondant using leaf-shaped cutters, or rice krispies tossed with green candy melts (or green-colored white chocolate) put on individually or in clumps. There are also molds of leaves so they are more 3-D than the flat ones cut from fondant.
5. Let the leaf glue dry.
Hope that makes sense.
Edited by shanter - 7/9/13 at 7:23pm