01 - Set the oven to 350°F. Line a 9x13-inch baking pan with parchment paper, leaving overhang for easy removal.
02 - Cream together softened butter and sugar in a medium bowl until light and fluffy. Incorporate flour and salt until just combined.
03 - Press dough evenly into the prepared pan's bottom. Bake for 18 to 20 minutes until lightly golden.
04 - Whisk sugar and flour in a separate bowl. Add eggs, lemon juice, and lemon zest, mixing until smooth.
05 - Immediately pour the lemon mixture over the hot crust upon removal from oven.
06 - Return the pan to the oven and bake for 15 to 18 minutes until the filling sets and slightly jiggles.
07 - Allow bars to cool completely in the pan on a wire rack. Lift using parchment overhang and cut into squares.
08 - Dust the cooled bars with powdered sugar before serving.