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. Set aside.
03 - In a large bowl, cream the softened butter and granulated sugar until light and fluffy, about 2-3 minutes.
04 - Beat in the egg until fully incorporated.
05 - Add ricotta cheese, lemon zest, lemon juice, and vanilla extract. Mix until smooth.
06 - Gradually add the dry ingredients to the wet ingredients, mixing just until combined.
07 - Drop tablespoonfuls of dough onto the prepared baking sheets, spacing 2 inches apart.
08 - Bake for 13-15 minutes, or until the edges are lightly golden and centers are set.
09 - Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
10 - Whisk powdered sugar with 2 tablespoons lemon juice until smooth and pourable. Add more juice if needed.
11 - Spoon or drizzle glaze over cooled cookies. Garnish with lemon zest if desired. Allow glaze to set before serving.