01 - Heat oven to 350°F and line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt; set aside.
03 - Using an electric mixer, beat butter and sugar until light and fluffy, approximately 2 to 3 minutes.
04 - Add egg, ricotta, lemon juice, lemon zest, and vanilla extract to the butter mixture; mix thoroughly.
05 - Gradually add dry ingredients to the wet, mixing on low speed until just combined.
06 - Drop rounded tablespoons of dough onto prepared sheets, spacing about 2 inches apart.
07 - Bake for 13 to 15 minutes until edges turn lightly golden but centers remain soft.
08 - Let cookies cool on sheets for 5 minutes before transferring to a wire rack to cool completely.
09 - Whisk powdered sugar, lemon juice, and lemon zest until smooth and pourable.
10 - Once cooled, spoon or drizzle glaze over each cookie and allow to set for 15 minutes before serving.