Line a baking sheet or large tray with parchment paper.
Add the candy melts to a microwave safe bowl with an optional 2 teaspoons of vegetable shortening. Heat at 50% power (important, since you don't want to overheat your candy melts) in 30 second intervals, stirring in between each session. Continue until smooth and creamy.
Dip each Nutter Butter cookie into the melted candy coating, turning to coat. Use a silicone spatula to remove excess, if needed.
Place the dipped Nutter Butter cookie on the lined baking sheet and immediately press two candy eyes into the warm coating.
Repeat with the remaining Nutter Butter cookies until they have all been coated and given two eyes.
Place the tray or baking sheet of ghosts in the fridge to harden, about 1-2 hours.
After the ghosts are hardened, transfer them to an airtight container and keep them in the fridge until ready to serve.