Coat each cupcake with chocolate frosting and partially insert a peanut butter filled cookie into the top. Frost the remaining cookie with vanilla frosting. Draw a spooky expression on each ghost with the decorator's icing.
First, make the spiders by combining the chocolate chips and milk in a glass bowl. Microwave on high for 1 to 2 minutes, stirring frequently, until smooth. Stir in the nuts and chow mien noodles. Drop by teaspoons onto waxed paper. Stick on extra noodles for spider legs and chill. Frost the cupcakes white, then top each with a spider.