Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
In a large bowl, cream together the softened butter and sugar until light and fluffy. Beat in the eggs one at a time, then stir in the lemon juice and zest.
In a separate bowl, whisk together the gluten-free flour, baking powder, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Drop by rounded tablespoons onto the prepared baking sheets.
Bake for 10-12 minutes, or until the edges are lightly golden brown. Let cool on baking sheets for a few minutes before transferring to a wire rack to cool completely.
While the cookies are cooling, prepare the glaze by whisking together the powdered sugar and lemon juice until smooth. If the glaze is too thick, add a little more lemon juice; if it is too thin, add more powdered sugar.
Once the cookies are completely cool, drizzle the glaze over the top. Let the glaze set before serving.
Notes
Enjoy these delicious gluten-free lemon cookies with a cup of tea or coffee. They can be stored in an airtight container at room temperature for up to 3 days.