I made a test batch last night. I used this recipe ( http://www.food.com/recipe/severed-fingers-halloween-cookies-135850 ).
I added a little bloody ooze to complete the effect. (chocolate syrup mixed with red food coloring) I think I need a little bowl of the "blood" in the center for dipping.
The severed finger prop I made for Halloween "Pull my finger" gags. The liquid latex captured my fingerprints so clearly that I'm afraid I could be framed for a crime using this prop! :eekin:
A couple more photoz here...