Preheat oven to 350°
Cream sugar, shortening, molasses and egg in a mixer.
Sift remaining dry ingredients (salt, baking soda, flour, cinnamon, mace) into creamed mixture.
Add milk, mix with dough hook.
Drop dough onto parchment lined cookie sheet in 1 tablespoon increments. Flatten dough balls with floured, smooth-bottomed glass (to about ¼" height).
Bake for 12 minutes at 350°, remove to a cooling rack. Once cooled cookies should snap.
