Line a baking sheet with parchment paper. Set aside.
In a small microwave safe bowl, add the white chocolate. Chop into small pieces to make it easier to melt.
Warm for 20 second intervals, about 3-4 times, stirring in between each interval.
Once almost all the chocolate has been melted, continue stirring. The residual heat from the dish will help melt the remaining chocolate without overcooking it.
Place in a larger bowl filled with hot water. This will keep the chocolate warm long enough to frost the cookies.
Using a spoon, or a flat spatula, frost each cookie. Place on prepared baking sheet. Place 2 eyes on each ghost.
Place baking tray in refrigerator so the chocolate will harden.