What is a good suggestion for filling and decorete chocolate truffle cake???
Well if you are looking to make a chocolate truffle cake I would make a rich chocolate cake and fill it with ganache (perhaps whipped ganache). You could ice it with ganache too and dust it with cocoa powder.. that would make it look like a truffle too. It would be very rich, but truffles are supposed to be rich.
You could make it look like a truffle. They had cute ones in one of the Wilton yearbooks. They looked like chocolate bonbons & chocolate covered cherries, too.