There was a recipe for these in the chocolate-themed cookery book I bought Eni for her birthday, and she kindly typed it out for me. In order to distract myself from election horridness, I have thrown myself into productivity today and decided to make them. (Am also making a chickpea, chilli and lime soup later for tea...)
The ones at school were about twice the size, obviously, but I'd wager the cooks had more counter space than me. :P
Not bad for a first attempt, though!
They taste just as good as the originals, too. :D