Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a mixing bowl, cream butter and powdered sugar until light and fluffy.
Mix in vanilla extract.
Gradually add flour and salt, mixing until combined.
Fold in chopped pecans.
Roll dough into small balls and place them on the baking sheet.
Flatten slightly and bake for 15-18 minutes, or until golden brown.
Let cool on a wire rack before serving.