01 - Preheat oven to 350°F. Line two baking sheets with parchment paper for easy cleanup.
02 - Whisk together flour, baking powder, baking soda, and salt in a medium bowl until thoroughly blended.
03 - Beat softened butter and granulated sugar with an electric mixer on medium-high speed until pale and fluffy, approximately 2-3 minutes.
04 - Add the egg to the butter mixture and beat until fully incorporated and smooth.
05 - Mix in ricotta cheese, 2 tablespoons lemon juice, 1 tablespoon lemon zest, and vanilla extract until the batter is uniform and creamy.
06 - Gradually add the dry ingredient mixture to the wet ingredients on low speed, mixing just until combined. Take care not to overmix.
07 - Drop rounded tablespoons of dough onto prepared baking sheets, leaving 2 inches of space between each cookie to allow for spreading.
08 - Bake for 13-15 minutes until edges are lightly golden and centers appear set. Rotate pans halfway through for even baking.
09 - Let cookies rest on baking sheets for 5 minutes, then transfer to a wire rack to cool completely before glazing.
10 - Whisk together powdered sugar, 2-3 tablespoons lemon juice, and 1 teaspoon lemon zest in a small bowl until smooth and pourable. Adjust consistency with additional juice if needed.
11 - Drizzle or spoon the glaze over completely cooled cookies. Allow glaze to set for 15-20 minutes before serving or storing.