Set oven to 180c. Place 12 paper cases in a bun tray. Put all cakeingredients into a bowl and beat until smooth. Divide mixture amoung the cake cases and cook for 12-15 minutes until well risen and the cakes spring back when pressed with a fingertip. Leave to cool. Meanwhile make the topping by mixing the butter and the icing sugar together until smooth. add food colouring. Spread over the cakes. Add M&Ms for the eyes, short pieces of liquouish for the mouths and a dolly mixture for the nose. Break the chocolate into pieces melt in a bowl over a saucepan of gently simmering water and then spoon into a geaseproof paper piping bag. Snip off the tip and pipe hair, eyeballs glasses and moustaches onto the cakes. Carefully arrange in a single layer on a serving plate and allow icing to set before serving.