First up, cream together your shortening/butter and brown sugar. Next, add in the molasses, egg, flour, baking soda, salt, and spice. Mix it up good.
Take a small bowl and add in about a 1/4 cup of white sugar to it. Grab your dough by heaping teaspoons and roll it into a ball. Roll your ball in the white sugar, set it on your cookie sheet and smoosh it down with a fork. Repeat for the rest of the dough.
Pop your cookies in the oven at 350 for 9 to 11 minutes. While your cookies are cooling,whisk together the powdered sugar, vanilla, and milk. Spoon the glaze over each cookie and allow it to harden.