Preheat oven to 325°F. Line baking sheets with unbleached parchment paper.
Mix dry ingredients in large mixing bowl.
Add butter, egg and vanilla. Mix until combined.
Knead dough with hands until smooth.
Divide dough in two parts. Roll out between 2 sheets of unbleached parchment paper to 1/8" thickness. Don't roll too thin.
Cut out desired shapes with a 2- 2 1/2" cookie cutter. Remove top sheet of parchment. Remove scraps. Lift corner with thin spatula and then peel cookie off of the parchment with hands, being careful not to tear.
Place cookies on the parchment lined baking sheets about 1/2 inch apart. They will not spread.
Gather scraps and roll and cut them.
Place cookies, one sheet at a time in oven for about 8 minutes. Turning once during baking. Or until they spring back when press in the middle.