01 -
Preheat oven to 175°C. Line two baking sheets with parchment paper.
02 -
In a small bowl, whisk together flour, baking powder, and salt. Set aside.
03 -
In a large mixing bowl, beat butter, sugar, and lemon zest with an electric mixer fitted with a paddle attachment until light and fluffy, about 3 to 4 minutes, scraping down the sides as needed.
04 -
Add the egg and beat until very well combined, approximately 1 minute. Scrape down the bowl to ensure even mixing.
05 -
With mixer on low speed, blend in the flour mixture just until incorporated. The dough will appear slightly dry.
06 -
Using a medium spring-loaded scoop, portion 1.5 tablespoon-sized balls of dough onto prepared baking sheets, leaving 5 cm of space between each. Roll each ball gently with your palms, then flatten to approximately 8 mm thick.
07 -
Bake for 12 to 14 minutes or until cookies are just set and lightly golden on the edges. Allow to cool on baking sheet for 5 minutes, then transfer to wire racks to cool completely.
08 -
In a bowl, whisk powdered sugar with lemon juice, adding juice 1 tablespoon at a time, until a thick but pourable glaze forms. Spoon glaze over each cooled cookie and garnish with additional lemon zest if desired.
09 -
Allow glazed cookies to stand until the icing sets, about 30 minutes. Store in an airtight container at room temperature for up to 3 days.