CHIPS AHOY! Frankenstein Whoopie Pies

Candy eyes may bleed if stored in the freezer for more than 1 hour. If planning to freeze the whoopie pies longer than 1 hour, do not add the candy eyes until just before serving the whoopie pies. Or, you can instead use mini chocolate chips for the eyes since they can be frozen up to 1 week before serving the whoopie pies. 

For smoother sides of whipped topping filling, spoon tinted whipped topping into large pastry bag fitted with 1/2-inch round tip; use to pipe whipped topping onto the 16 cookies, then continue as directed. 

Omit green food coloring.  Instead fill cookies with plain whipped topping as directed. Add 2 candy eyes to filling in each whoopie pie to resemble a ghost. 

Omit green food color. Fill each of 2 cookies with 2 Tbsp. slightly softened green peppermint ice cream instead of the tinted whipped topping.