Preheat your oven to 350°F. Line a cookie sheet with parchment paper.
In a medium bowl, beat the softened butter with the granulated sugar and brown sugar until the mix is light and creamy.
Beat in the egg and vanilla extract until well combined.
In another bowl, whisk together the all-purpose flour and salt, then gradually add to the butter mixture, stirring until just blended.
Gently fold in the chopped pecans until evenly distributed.
Scoop dough balls about 1 inch in diameter onto the prepared sheet, spacing them 2 inches apart. Gently flatten each ball with the bottom of a glass to about 1/4 inch thick.
Bake for 9 to 12 minutes until lightly browned around the edges. Let the cookies cool on the sheet for a few minutes before transferring them to a wire rack to cool completely.