If you want a chocolate mead, you could try extract. You could make a melomel (strawberry, maybe, or perhaps orange!) then add a little chocolate extract to it. Not much, because it quickly overpowers the subtlety of the fruit. But then you don't have to worry about the mess of chocolate/cocoa and can easily control the amount of chocolate flavor you have in it. I've used extracts in a few meads & beers - placed in a competition for a cherry vanilla mead. Cherry melomel + Nielsen Massey vanilla extract. mmmm
