01 - Preheat the oven to 350°F and line two baking sheets with parchment paper.
02 - Whisk together flour, baking powder, baking soda, and salt in a medium bowl. Set aside.
03 - In a large bowl, beat butter and sugar with an electric mixer until light and fluffy, approximately 2 to 3 minutes.
04 - Add the egg and blend until combined, then mix in ricotta, lemon zest, lemon juice, and vanilla extract until well incorporated.
05 - Gradually add the dry ingredients to the wet mixture, stirring gently until a soft dough forms.
06 - Drop rounded tablespoons of dough onto the prepared baking sheets, spacing each about 2 inches apart.
07 - Bake for 13 to 15 minutes, until edges are lightly golden and centers set. Allow cookies to cool on the sheets for 5 minutes before transferring to a wire rack.
08 - Whisk powdered sugar, lemon juice, and lemon zest in a small bowl until smooth.
09 - Once cookies are fully cooled, drizzle or spoon the glaze over each. Allow the glaze to set before serving.