In a large bowl, put in your white chocolate, cut up into small pieces or your white chocolate chips
Over medium heat, warm up the milk until you just start seeing bubbles..
Pour the milk over your white chocolate.
Mix until your chocolate is melted and the milk is smooth and not lumpy
Add your vanilla and your desired food coloring.
If desired, take some mini marshmallows and draw little ghost faces on them with an edible marker.
Serve with whip cream and whatever topping you like, sprinkles, candy eyes, etc.