01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, allowing an overhang for easy removal later.
02 - Beat butter and sugar until creamy in a medium bowl. Add flour and salt, mixing until a crumbly dough forms.
03 - Press dough evenly into the bottom of the prepared pan. Bake for 18–20 minutes until edges are lightly golden.
04 - Whisk together sugar, eggs, lemon juice, and lemon zest in a large bowl until smooth. Whisk in flour until fully combined.
05 - Gently fold in the raspberries, taking care not to crush them completely.
06 - Pour the filling mixture over the hot crust immediately after removing from the oven.
07 - Return pan to oven and bake for 20–22 minutes until center is just set and no longer jiggles.
08 - Cool completely in pan on a wire rack. Refrigerate for at least 2 hours to make slicing easier.
09 - Lift bars from pan using parchment overhang. Dust with powdered sugar before cutting. Garnish with additional raspberries if desired.