Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a mixing bowl, whisk together the flour, baking powder, baking soda, and salt.

In another bowl, mix the ricotta, sugar, egg, lemon zest, lemon juice, and vanilla until smooth.

Gradually add the dry ingredients to the wet ingredients and mix until just combined.

Drop tablespoon-sized portions of dough onto the prepared baking sheet, spacing them about 2 inches apart.

Bake for 15-20 minutes or until the edges are lightly golden.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring to a wire rack.

Once cooled, dust with powdered sugar before serving.