Line a large tray with baking paper.
Melt the white chocolate/candy melts 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.
Once you have made roughly 20 ghosts, pop them in the fridge for around 30 minutes to set.
Once set, peel the ghosts off of the baking paper. I like to flip them over so the top surface is super flat and smooth but this is optional.
Melt the dark 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 or let them sit at room temperature until the dark chocolate has set then enjoy!