Preheat oven to 350°F (175°C). Line a 9x13-inch baking pan with parchment paper.

In a mixing bowl, cream together the softened butter and 1/2 cup sugar until smooth.

Gradually add 2 cups flour and salt to the butter mixture, mixing until a dough forms.

Press the dough evenly into the prepared pan. Bake for 15-18 minutes until lightly golden.

While the crust bakes, whisk together eggs, 1 1/2 cups sugar, 1/4 cup flour, lemon juice, and lemon zest in a bowl.

Pour the lemon mixture over the baked crust and return to the oven. Bake for 20-25 minutes until set.

Let the lemon bars cool completely in the pan, then refrigerate for at least 1 hour.

Cut into squares and dust with powdered sugar before serving.