Preheat oven to 375 degrees. Combine softened butter, sugar, molasses, and egg in mixer. Beat well. Sift dry ingredients together and add to wet mixture. Stir until just combined. Stir in crystallized ginger. Roll dough into 1 inch balls and roll in granulated sugar. Place on silpat or greased cookie sheet and bake for 8-10 minutes. (I tried baking them for 8 minutes so that they would stay soft for when I froze the ice cream sandwiches.)