These are sooo easy and a nice alternative to baking the real thing when a quick urge for a whoopie pie strikes, or for an unplanned coffee and tea get-together.
For each Cookie Whoopie, mix equal parts of icing with marshmallow creme. (About a heaping tablespoon of each - depending on the size of the cookies.)
Spread on the flat side of one cookie. Top with another cookie, flat side facing filling.
You can make different color fillings depending on the frosting you use. the choices are endless with all the kinds of great cookies and frosting now available.
I'm thinking of some soft pumpkin cookies with vanilla filling for this time of year.