1) Preheat oven to 350 degrees. Spray an 8 or 9-inch square pan with nonstick cooking spray. In a medium bowl, stir together flour and salt. Using an electric mixer, cream the butter, sugar and lemon zest at medium speed until light and fluffy.

2) Add eggs, 1 at a time, beating well after each addition. Stir in 2 tablespoons lemon juice. Reduce speed to low and add flour mixture, mixing until incorporated.

3) Spread batter into prepared pan and bake for about 30-35 minutes, or until toothpick inserted in center comes out clean. Cool on wire rack to room temperature.Meanwhile, make the glaze by combining the powdered sugar, lemon juice and zest in a small bowl.

4) Spread over brownies and let set for at least 10 minutes before serving.