1Preheat the oven to 350°F. In a medium bowl, mix together the flour, ginger, cinnamon, baking soda, nutmeg and salt. Beat 3/4 cup of the butter and brown sugar in a large bowl with an electric mixer on medium speed until light and fluffy. Add the molasses and egg; beat well. Gradually beat in the flour mixture until well blended. Press the dough into a thick flat disk; wrap in plastic wrap. Refrigerate for 4 hours or overnight.
2Shape the dough into 1 inch balls. Roll in granulated sugar. Place 2 inches apart on ungreased (or parchment lined) baking sheets.
3Bake for 8 to 10 minutes or until the edges just begin to brown. Remove to wire racks; cool completely.
4Mix the marshmallow cream, remaining 1/4 cup butter, cream cheese, and extract until well blended. Place about 1 T. of the filling on the flat side of 1 cookie. Top with a second cookie, pressing gently to spread the filling. Repeat with the remaining cookies. Roll the edges of the cookies in the chopped pepperming candy.