01 - Preheat the oven to 350°F and line two baking sheets with parchment paper.
02 - In a large bowl, cream together the softened butter and sugar until pale and fluffy.
03 - Beat in the egg, lemon juice, lemon zest, and vanilla extract until fully combined.
04 - In a separate bowl, whisk together the flour, baking soda, and salt.
05 - Gradually add the dry ingredients into the wet mixture, mixing just until incorporated. Be careful not to overmix.
06 - Scoop heaping tablespoons of dough and, if desired, roll each ball in powdered sugar to coat evenly.
07 - Place dough balls 2 inches apart on the prepared baking sheets.
08 - Bake for 9 to 11 minutes, or until edges are just set and centers appear slightly underbaked.
09 - Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.