Mix flour, ginger, cinnamon, baking soda, nutmeg, and salt in a large bowl.
In a stand mixer, beat butter and brown sugar on medium speed until light and fluffy. Add Molasses, egg and vanilla, beat well to mix.
Gradually add dry mixture to wet ingredients, beating on low speed until well mixed.
Wrap dough in plastic wrap and refrigerate for 4 hours or overnight.
Preheat oven to 350 F. and line cookie sheets with parchment paper. Shape dough into mini balls with a cookie scoop, should be a little over a tsp size then roll in granulated sugar to lightly coat.
Place balls 2 inches apart on the prepared baking sheet. Bake 8 to 10 minutes or until the edges of cookies just begin to brown.
If you plan on adding icing to the center, immediately make an indent in the tops of the cookies, I like to use the handle of my wooden spoon for this.
Once slightly cooled add icing and sanding sugar to decorate.