Before you begin, get your cupcake cases ready. I used mini ones and placed them in a cupcake tray to give them more support.
Break the chocolate in to a measuring jug and place in a pan of boiling water until it melts. Stir continuously so that the chocolate doesn't burn.
Spoon the chocolate in to the case and smear up the sides so that is creates a nice thick coating.
Leave to set.
Fill the cups with peanut butter, smooth off, sprinkle with sugar and leave to set. Yum!