Preheat the oven to 300 degrees F and line baking sheets with parchment paper
In a large bowl beat together the butter and powdered sugar until it is light and airy.
Next mix in the other ingredients (flour, cornstarch, salt, and vanilla extract)
Dust hands with flour or cornstarch and form the dough into small balls. I made mine into balls a little smaller than a tablespoon.
Place onto the lined baking sheets and press down each cookie with the top of a fork. You may want to dip it in the flour or cornstarch to keep it from sticking.