Has anyone ever made chocolate petits fours? I've made white cake ones with white poured fondant icing. Should I add cocoa powder to the poured fondant or would chocolate ganache be a better option?

Chocolate poured fondant recipe:

http://www.wilton.com/recipes/recipesandprojects/icing/chocofondant.cfm

Wilton candy melts ganache glaze:

http://www.wilton.com/recipes/recipesandprojects/candy/ganache_glaze.cfm

Everything you ever wanted to know about ganache:
(Overview, master and other recipes including white chocolate. How-to-glaze, smooth, stack and more.)

http://forum.cakecentral.com/cake-decorating-ftopict-497433-.html

Chocolate 101:

http://tinyurl.com/ytby97

...who doesn't like chocolate ganache....