Prepare the Chewy Ginger Molasses Cookies according to the recipe instructions.
As cookies are cooling, prepare your creme pie filling by creaming together shortening and marshmallow cream until well-combined. Add confectioner's sugar, vanilla, and milk. Cream on low speed for about 1 minute. If the filling is too thick, add a little bit more milk to make the filling spreadable, but still where it will hold onto the beater.
Add one tablespoon of creme pie filling to the flat side of one of the Ginger Molasses cookies. Press a second cookie on top of the filling. Repeat until all creme pies have been assembled. Chill in the refrigerator for about 30 minutes to help the creme pie filling firm more before serving.