Let's cook.
Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking powder, and salt.
In a large bowl, cream together the softened butter and granulated sugar with an electric mixer until light and fluffy, about 2-3 minutes.
Beat in the egg, then stir in the ricotta cheese, lemon zest, and vanilla extract until well combined.
Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined. Do not overmix.
Drop rounded tablespoons of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes, or until the edges are lightly golden and the centers are set. Do not overbake.
Remove cookies from the oven and let them cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.
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