Hi all!  I have a customer who wants a square cake, covered in white fondant, and stenciled with black icing. I'm worried the black icing will stain people's teeth?  Am I right?  I was thinking if that was the case I would put a band of black fondant and the stencil on that with white icing. The stencil they want is a Greek key design. Any help/advice you can provide is appreciated,  thanks. 

AStart with chocolate and it won't be a problem.

Yes!  It will stain the teeth and the lips, not for long, but long enough to be embarrassed at the party.  

Thank you both!

yes.  And there will be pictures.  On the Interwebs. Forever.