01 -
Preheat oven to 350°F (175°C). Line a 9x9-inch baking pan with parchment paper, leaving an overhang for easy removal.
02 -
Combine softened butter and 0.5 cup granulated sugar in a large bowl. Cream together until pale and fluffy. Add 2 cups all-purpose flour and 0.25 teaspoon salt, mixing until the dough forms large clumps.
03 -
Press dough evenly into the bottom of prepared pan and slightly up the sides, creating a ledge about 1/3 inch high. Bake for 20–22 minutes or until the surface is set and the edges are lightly golden.
04 -
While crust bakes, blend 1.25 cups raspberries until smooth. For a seedless filling, strain puree through a fine sieve. Transfer to a saucepan and cook over medium heat, stirring often, until reduced by half and thickened; about 8–10 minutes. Let cool.
05 -
In a bowl, whisk together 4 eggs, 1.25 cups granulated sugar, 0.33 cup fresh lemon juice, 1 tablespoon lemon zest, 0.25 cup all-purpose flour, and 0.5 tablespoon cornstarch until smooth. Stir in thickened raspberry puree until combined.
06 -
Once shortbread base has baked, remove from oven and gently prick the surface with a fork. Pour lemon raspberry filling evenly over the warm crust.
07 -
Return pan to oven. Bake at 350°F (175°C) for 25–28 minutes, or until the center is set and does not jiggle when gently shaken.
08 -
Allow pan to cool completely at room temperature, then refrigerate for a minimum of 3 hours to fully set before slicing.
09 -
Dust bars with powdered sugar prior to serving. Top with a dollop of whipped cream if desired.