01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together 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, approximately 2-3 minutes.
04 - Add egg and mix until fully incorporated into the butter mixture.
05 - Mix in ricotta, lemon zest, lemon juice, and vanilla extract until smooth.
06 - Gradually add dry ingredients to wet mixture on low speed until just combined. Avoid overmixing.
07 - Drop tablespoon-sized mounds onto prepared baking sheets, spacing 2 inches apart.
08 - Bake for 13-15 minutes until set and edges are lightly golden.
09 - Let cool on baking sheets for 5 minutes, then transfer to wire rack to cool completely.
10 - Whisk together powdered sugar, lemon juice, and zest until smooth and pourable.
11 - Drizzle glaze over completely cooled cookies. Allow glaze to set before serving.