Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a mixing bowl, whisk together the flour, baking soda, and salt. Set aside.

In another bowl, cream together the softened butter and brown sugar using an electric mixer until light and fluffy.

Add the egg and vanilla extract, mixing until well combined.

Gradually add the dry ingredients to the wet mixture, mixing until just combined.

Fold in the chopped pecans.

Drop tablespoon-sized portions of dough onto the prepared baking sheet, spacing them about 2 inches apart.

Bake in the preheated oven for 10-12 minutes or until the edges are lightly golden.

Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.