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.
03 - In a large bowl, beat butter and sugar with an electric mixer until light and fluffy, about 2-3 minutes.
04 - Add the egg and beat until incorporated. Mix in ricotta cheese, lemon zest, lemon juice, and vanilla extract until smooth.
05 - Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined.
06 - Drop tablespoonfuls of dough onto prepared baking sheets, spacing about 2 inches apart.
07 - Bake for 13-15 minutes, or until edges are lightly golden and centers are set.
08 - Allow cookies to cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.
09 - Whisk together powdered sugar, lemon juice, and lemon zest in a small bowl until smooth.
10 - Once cookies are cool, spoon or drizzle glaze over each cookie. Allow glaze to set before serving.