01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt until well combined.
03 - In a large bowl, beat the butter and sugar with an electric mixer until light and fluffy, about 2-3 minutes.
04 - Add the egg and beat until well incorporated into the mixture.
05 - Mix in the ricotta cheese, lemon juice, lemon zest, and vanilla extract until smooth and fully combined.
06 - Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined. Do not overmix.
07 - Drop rounded tablespoons of dough onto the prepared baking sheets, spacing them 2 inches apart to allow for spreading.
08 - Bake for 13-15 minutes, or until the edges are lightly golden and the centers are set.
09 - Allow cookies to cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.
10 - Whisk powdered sugar, lemon juice, and lemon zest in a small bowl until smooth and pourable consistency is achieved.
11 - Spoon or drizzle glaze over the cooled cookies. Allow glaze to set before serving.