the best we've ever had.
Preheat oven to 350.
Mix all dough ingredients until smooth.
Drop on cookie sheet; bake 12 – 14 mins, rotating sheets between upper & lower racks halfway through.
Prepare creme filling by mixing at medium speed; reduce speed to low & gradually beat in icing sugar.
Beat in marshmallow creme & vanilla until smooth.
Spread 1 rounded Tbs filling on flat side of 12 cookies; top with remaining cookies.
Filling:
6 Tbs butter (softened)
1 cup icing sugar
1 jar marshmallow creme (7 – 7 1/2 oz)
1 tsp vanilla