Cream the butter and sugar until light and fluffy.

Add egg, lemon zest, and lemon juice, mixing on low until combined.

In a separate bowl, whisk together flour, baking powder, and salt; then combine with wet mixture.

Chill the dough for at least 30 minutes.

Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.

Shape dough into tablespoon-sized balls and place on the baking sheet.

Coat each ball in powdered sugar before baking.

Bake for 10-12 minutes until edges are set and tops are crackled.

Let cookies cool on the tray for 5 minutes before transferring to a wire rack.