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