Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a large mixing bowl, cream together the butter and sugar until light and fluffy.
Add the ricotta cheese, vanilla extract, and lemon zest. Mix until well combined.
In a separate bowl, whisk together the flour, baking powder, and salt. Gradually add to the wet ingredients, mixing until just combined.
Drop tablespoonfuls of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 12-15 minutes, or until the edges are lightly golden. Allow to cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.