01 - Preheat oven to 350°F (175°C). Lightly grease an 8 x 8 inch baking pan.
02 - Combine all-purpose flour, unsalted butter, and powdered sugar until mixture resembles coarse crumbs. Press evenly into prepared baking pan to form the crust.
03 - Bake crust for 15 minutes or until edges are lightly golden.
04 - In a bowl, whisk together eggs, granulated sugar, all-purpose flour, and lemon juice until smooth.
05 - Pour lemon filling over the pre-baked crust. Distribute raspberries on top and swirl gently with a knife to create a marbled effect.
06 - Return to oven and bake for 25–30 minutes, until the filling is set and the surface appears firm.
07 - Allow bars to cool completely in the pan before slicing. Optionally, dust bars with powdered sugar before serving.