Preheat your oven to 350°F (180°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine almond flour, baking powder, and salt.
In another bowl, whisk together the granulated sugar, egg, lemon zest, and fresh lemon juice until well combined.
Gradually fold the wet ingredients into the dry mixture until fully incorporated.
Cover the dough and chill in the refrigerator for at least 30 minutes.
Once chilled, scoop tablespoon-sized portions of dough and roll them into balls.
Roll each ball in powdered sugar until well-coated.
Place the cookies on 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.
Remove from the oven and let cool on the baking sheet for 5 minutes before transferring to a wire rack.