01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, allowing overhang for easy removal.
02 - Beat butter and sugar until creamy. Mix in flour and salt 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 raspberries into the lemon mixture, taking care not to crush completely.
06 - Pour filling over hot crust immediately after removing from oven. Bake for 20-22 minutes until center is just set.
07 - Cool completely in pan on wire rack. Refrigerate at least 2 hours for clean slicing.
08 - Lift bars from pan using parchment. Dust with powdered sugar, slice into 16 bars, and garnish with extra raspberries if desired.