Mix together thoroughly butter, sugar, egg, and molasses.
Sift together the dry ingredients and add to the creamed butter mixture. Add the candied ginger bits.
Chill dough.
Roll into balls and dip the tops in sugar (I like to use turandabo sugar – it gives the cookie a lovely crunch). Place sugar side up and three inches apart on a greased baking sheet. Sprinkle each cookie with two or three drops of water to produce a crackled surface on the cookie (this is optional).
Bake at 375 degrees for 10 to 12 minutes until set but not hard.