If making potatoes, wash and peel potatoes. Cut into large chunks and boil 15 minutes or until fork tender.
Drain well and add butter and sour cream. Mash potatoes adding milk a bit at a time until desired consistency is reached. You don't want your potatoes too soft for this recipe so your ghosts can "stand up".
Place potatoes in a large Ziploc bag and snip off the corner. Pipe Ghost shapes onto a parchment line pan. If your potatoes have cooled, you can bake them for 10-12 minutes at 350 to heat them up, if they are already warm, you can pipe them directly onto the plates.
For the Face:
For eyes and mouth, using a veggie peeler or carrot peeler, peel a thin strip of dark peel off of your zucchini or eggplant. Cut eyes out with a straw.
For the mouth I used a large thick straw and then a smaller straw to cut our the hole in the middle.