01 - Preheat oven to 350°F (175°C). Line a 9x13 inch baking pan with parchment paper, leaving overhang for easy removal.
02 - In a large bowl, cream softened butter and 1/2 cup sugar until light and fluffy. Add 2 cups flour and 1/4 teaspoon salt, mixing until dough forms.
03 - Press dough evenly into pan bottom. Bake for 18–20 minutes until lightly golden.
04 - Whisk together sugar and flour in medium bowl. Add eggs, lemon juice, and lemon zest; whisk until well combined.
05 - Pour lemon mixture over hot crust immediately after removing from oven.
06 - Bake for 18–20 minutes until filling is just set in center.
07 - Cool completely in pan. Lift out using parchment handles and slice into 16 bars.
08 - Dust generously with powdered sugar before serving.