Preheat oven to 325 and place dough, 2" apart on a parchment paper lined baking sheet and bake for 12-14 minutes or until edges are firm. Remove from oven and let stand to cool on baking sheet for 2 minutes before moving to a cooling rack to cool completely.
Once cookies are cool, mix together powdered sugar and milk until you have a glaze consistency that will fall off a spoon but isn't too thin that it barely sticks onto the spoon. Drizzle on top of cookies and let stand to harden.