Preheat the oven to 350°F (175°C)
Line an 8×8-inch baking pan with parchment paper
Mix 1 cup all-purpose flour, 1/4 cup powdered sugar, and 1/2 cup softened butter until crumbly
Press the mixture evenly into the pan
Bake the crust for 18 to 20 minutes until lightly golden
Whisk 2 large eggs, 3/4 cup granulated sugar, 2 tablespoons flour, 1/4 cup fresh lemon juice, and 1 teaspoon lemon zest
Pour the lemon mixture over the hot crust
Bake for 20 to 25 minutes until the filling is set
Cool completely in the pan
Chill before cutting into bars
Dust with powdered sugar before serving