1Preheat oven to 350 degrees.
Greast light colored baking sheet with non-stick cooking spray and set aside.
2In a large bowl, cream butter and sugar together until light and fluffy.
Whip in vanilla, egg, lemon zest and juice.
Scrape sides and mix again.
Stir in all dry ingredients -- EXCEPT FOR POWDERED SUGAR -- slowly until just combined. Scrape side of bowl and mix again briefly.
3Pour powdered sugar onto a large plate. Roll a heaping teaspoon of dough into a ball and roll in powdered sugar. Place on baking sheet and repeat with remaining dough.
4Bake for 9-11 minutes or until bottoms begin to barely brown and cookies look matte (not melted or shiny). Remove from oven and cool cookies about 3 minutes before transferring to cooling rack.