Using an electric mixer on medium speed, beat the brown sugar, butter, and vanilla until well-blended. Add the eggs, one at a time, beating well after each addition. Beat in the baking soda and salt.
Reduce mixer speed to low. Gradually add the flour, mixing just until combined. Stir in the nuts.
Cover the bowl and refrigerate for 1 hour.
Preheat oven to 350°F (175°C). Line baking sheets with parchment paper or silicone liners.
Place the confectioners’ sugar in a shallow dish. Using a tablespoonful of dough at a time, roll the dough into balls. Then roll the balls in confectioners’ sugar, coating thoroughly. Place the dough balls 2 inches apart on the prepared baking sheets.
Bake one pan at a time for 12 minutes, or until the cookies have spread and cracked on top.
Place the pans on a wire rack and allow to cool for 5 minutes. Then, transfer the cookies directly onto wire racks to cool completely.
Notes
*Before toasting pecans, lightly spritz with water and sprinkle with salt. Bake at 350°F for 8 to 12 minutes.