I found this recipe in a Company's Coming Cook Book. It's quick and easy to make.
1/2 cup Butter or margarine
1/3 cup Cocoa
3/4 cup Icing sugar
Crushed nuts, or anything else you would like to roll your truffle in (I like crushed candy cane for Christmas, cocoa or icing sugar)
Cream butter until soft and pliable. Sift in cocoa, blend well. Add icing sugar, sifting if any lumps. Mix well, adding more icing sugar if to soft to roll. Your able to work 1-2 spoonfuls at least into batter. Shape into roll.
Roll in nuts, chill several hours, then slice.
*I just made this recipe but instead of rolling and cutting the truffle, I just rolled it into balls and it turned out great.