While your cakes are cooling put the soft cheese and butter in a clean, medium mixing bowl and beat together with a wooden spoon until smooth and thoroughly blended.
Beat in the vanilla extract and sift in the icing sugar and beat again until the frosting is smooth and creamy.
Add the desired amount of black food colouring paste to achieve the depth of colour desired.
Put the frosting into a piping bag and chill in the fridge until your cakes are cool enough to decorate.
Prepare your wings by separating the Oreo biscuits and cutting each side in half. Scrape off the inner cream filling and if you don't have ready made googly eyes you can use this cream filling to shape some eyes for your bats then dot the centres with black food paste using a toothpick.
Once the frosting has chilled for a while you can pipe onto the cooled cupcakes then insert each cake with a pair of oreo wings and googly eyes.