01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together gluten-free flour, baking powder, baking soda, and salt in a medium bowl. Set aside.
03 - Beat butter and sugar with electric mixer until light and fluffy, about 2–3 minutes.
04 - Add ricotta cheese, eggs, lemon zest, lemon juice, and vanilla. Mix until smooth.
05 - Gradually add dry ingredients to wet mixture. Mix on low speed until just combined.
06 - Drop rounded tablespoons of dough onto prepared baking sheets, spacing about 2 inches apart.
07 - Bake for 13–15 minutes until edges are lightly golden and centers are set.
08 - Let cookies cool on baking sheets for 5 minutes, then transfer to wire rack to cool completely.
09 - Whisk powdered sugar and lemon juice until smooth and pourable. Drizzle over cooled cookies and let set before serving.