01 - Preheat oven to 350°F. Line a 9x13 inch baking pan with parchment paper, allowing overhang for easy removal.
02 - Cream softened butter and 1/2 cup sugar in large bowl until fluffy. Blend in 2 cups flour and salt until dough forms.
03 - Press dough evenly into prepared pan. Bake 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 zest. Whisk until smooth.
05 - Pour lemon mixture over hot crust immediately. Return to oven and bake 18-20 minutes until center is set.
06 - Let cool completely in pan. Lift out using parchment handles. Cut into 16 bars and dust with powdered sugar.