01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, leaving overhang for easy removal.
02 - Beat butter and sugar until creamy. Add flour and salt, mixing until crumbly dough forms.
03 - Press dough evenly into pan bottom. Bake for 18-20 minutes until edges are lightly golden.
04 - Whisk together sugar, eggs, lemon juice, and lemon zest until smooth. Whisk in flour until fully combined.
05 - Gently fold in raspberries, being careful not to crush them completely.
06 - Pour filling over hot crust immediately. Return to oven and bake for 20-22 minutes until center is just set.
07 - Cool completely in pan on wire rack. Refrigerate for at least 2 hours for easier slicing.
08 - Lift out using parchment overhang. Dust with powdered sugar before slicing into bars. Garnish with extra raspberries if desired.