Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a large bowl, cream together the butter, sugar, and lemon zest until light and fluffy.
Beat in the eggs one at a time, then stir in the lemon juice.
In a separate bowl, whisk together the flour, baking powder, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Drop spoonfuls of the batter onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes or until the edges are lightly golden.
Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.