Line a large tray with baking paper/ parchment paper.
Melt the white chocolate in a heatproof bowl in the microwave, making sure to stir it every 30 seconds to prevent seizing.
Take a teaspoon of the melted chocolate and place it onto the lined tray. Then use the spoon to drag it out a little to make a ghost tail.
Pop them in the fridge for around 10-15 minutes to set.
Once set, melt the milk chocolate and put it into a piping bag with a very small hole cut off the end. Pipe two eyes and a mouth onto each ghost.
Put them back in the fridge until the milk chocolate has set then enjoy!