Preheat your oven to 350°F (175°C). Grease an 8x8 inch baking pan or line it with parchment paper for easy removal.
In a medium bowl, mix the flour, powdered sugar, melted butter, and salt until crumbly. Press this mixture firmly into the bottom of the prepared pan to form a crust.
Bake the crust in the preheated oven for about 15 minutes, or until it's lightly golden. Remove from the oven and allow to cool slightly.
In a separate bowl, whisk together the eggs and granulated sugar until smooth. Add the lemon zest and lemon juice, mixing until well combined.
Gently fold in the raspberries, being careful not to crush them too much.
Pour the lemon-raspberry mixture over the cooled crust, spreading it evenly.
Return the pan to the oven and bake for an additional 20-25 minutes, or until the filling is set and slightly golden around the edges.
Once baked, remove from the oven and let it cool completely in the pan on a wire rack.
Once cooled, refrigerate for at least 2 hours before cutting into squares. Dust with powdered sugar before serving if desired.
Notes
Dust with powdered sugar before serving if desired.