01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, baking soda, and salt in a medium bowl. Set aside.
03 - Beat butter and sugar until light and fluffy, approximately 2-3 minutes.
04 - Beat in lemon zest, egg, lemon juice, and vanilla extract until fully incorporated.
05 - Gradually add dry ingredients to wet mixture, mixing just until combined.
06 - Scoop tablespoon-sized dough balls and roll each in additional sugar to coat evenly.
07 - Place cookies 2 inches apart on prepared baking sheets.
08 - Bake for 9-11 minutes until edges are lightly golden and centers are just set.
09 - Let cookies rest on baking sheet for 5 minutes before transferring to wire rack to cool completely.