01 - Preheat oven to 350°F. Line a 9x13 inch baking pan with parchment paper, leaving an overhang for easy removal.
02 - Cream together softened butter and 1/2 cup sugar until light and fluffy. Blend in 2 cups flour and 1/4 teaspoon salt, mixing just until dough forms.
03 - Press dough evenly into the bottom of the prepared pan. Bake for 18-20 minutes until lightly golden.
04 - Whisk together 1 and 1/2 cups sugar and 1/4 cup flour. Add eggs, lemon juice, and lemon zest, whisking until fully combined.
05 - Pour lemon mixture over the hot crust immediately after removing from oven.
06 - Bake for 18-20 minutes until filling is just set in the center.
07 - Let cool completely in the pan. Lift out using parchment handles and slice into 16 bars. Dust generously with powdered sugar before serving.