Preheat the oven to 350°F (175°C). Line baking sheets with parchment paper.
In a small bowl, whisk together the flour, baking powder, and salt.
In a large mixing bowl, cream together the butter and sugar until light and fluffy.
Beat in the egg, lemon zest, lemon juice, and vanilla extract until well combined.
Gradually add the flour mixture to the creamed mixture, mixing until just combined.
Gently fold in the raspberries.
Drop rounded tablespoons of cookie dough onto prepared baking sheets.
Bake for 10-12 minutes, or until the edges are lightly golden. Cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.
Notes
Store cookies in an airtight container for up to a week.