Preheat oven to 375 degrees. Line 2 baking sheets with parchment paper; set aside.
In a small bowl, stir together flour, baking soda, and baking powder; set aside.
In a large bowl, cream together the butter and sugar until smooth.
Beat in the egg and vanilla. Gradually blend in the flour mixture.
Roll dough into rounded teaspoonfuls of dough into balls and place onto the prepared cookie sheets.
Bake 8 to 10 minutes, or until golden, in the preheated oven.
Let stand on the cookie sheet 2 minutes before removing to wire rack to cool completely.