Chocolate self-saucing jar puddings

It has always fascinated me how a sprinkling of cocoa and sugar followed by some boiling water poured over a pudding batter can magically form a deliciously rich chocolate sauce underneath the pudding when baked. No easy way of explaining — just watch in awe and enjoy! You will need six recycled jam jars for this recipe — being able to see the distinct layers through the glass just adds to the wonder.