Preheat oven to 350 degrees F.
In a medium mixing bowl, whisk together all purpose flour and corn starch. Set aside.
In the bowl of an electric stand mixer with the paddle attachment, cream butter for 1 minute.
With the mixer on low speed, gradually pour in powdered sugar and mix 1 more minute. Scrape down the sides of the bowl and add in vanilla. Mix until combined.
Scrape down the sides and bottom of the mixing bowl.
With the mixer on low speed, gradually pour in dry ingredients. Scrape down the sides once all has been added.
Mix on medium speed until well combined about 2 minutes
Use a tablespoon to scoop batter and drop onto cookie sheet.
Bake for 9-12 minutes until slightly golden on the outer edges.
Allow to cool for 5 minutes on cookie sheet before transfering to cooling rack to cool completely.
Store in an airtight container. Will remain fresh for 1 week.
Can store in an airtight container in the freezer for up to 1 month.