Prepare Your Workspace by gathering all your ingredients and setting up a clean workspace.

In a bowl, combine the icing sugar with a small amount of water until it reaches a thick but pourable consistency.

Dip each chocolate chunk cookie into the icing sugar mixture, ensuring they are fully covered.

While the icing is still wet, gently press one vegan marshmallow onto each cookie.

Using black writing icing, carefully draw eyes and mouths on each marshmallow.

Once everything is set, arrange your Ghost cookies on a platter and serve them.