01 - Preheat oven to 350°F and line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
03 - In a large bowl, cream the softened butter and granulated sugar together until light and fluffy.
04 - Beat in the eggs one at a time, then add the fresh lemon juice, lemon zest, and vanilla extract. Mix until well combined.
05 - Gradually add the dry ingredients to the wet mixture, mixing until just combined. Do not overmix.
06 - Scoop tablespoon-sized portions of dough and roll into balls. Roll each ball thoroughly in powdered sugar to coat evenly.
07 - Place the coated dough balls 2 inches apart on the prepared baking sheets.
08 - Bake for 10 to 12 minutes until the edges are set but the centers remain soft.
09 - Remove from the oven and let cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.