I am making a chocolate cake with chocolate BC that is to be covered in light pink fondant. Can I use the chocolate BC to cover the cake or it is it going to bleed through?

Mmmmmmm, not bleed thru, but possibly the dark color may show through, depends on how thick your fondant is.

That was what I was thinking. Any suggestions. Biirthday girl wants chocolate cake and chocolate buttercream. Should I crumb coat in white butter cream????

That might be a good idea! I would hate for the darkness to show thru the pretty light pink fondant!

How about white chocolate buttercream?

I would say just make sure you don't roll your fondant too thin. If you crumb coat in white BC, the chocolate BC is still going to be on the outer layer touching the fondant, so I don't see how that will matter?

That's true alicia...hmmm. Go thicker with your fondant. I would imagine that would avoid the whole hassle.