Step 1: Prepare the Pan
Preheat oven to 350°F (175°C).
Line a 9x13-inch baking pan with parchment paper, leaving overhang for easy removal.
Step 2: Make the Crust
In a mixing bowl, cream softened butter and sugar until light and fluffy.
Add flour and salt, mixing until crumbly dough forms.
Press dough evenly into the prepared pan.
Bake for 18–20 minutes, until lightly golden.
Remove from oven and keep oven on.
Step 3: Make the Lemon Filling
In a bowl, whisk eggs and sugar until smooth.
Add flour and whisk until fully combined.
Stir in fresh lemon juice and lemon zest.
Step 4: Bake the Bars
Pour filling over the warm crust.
Return to oven and bake 20–25 minutes, until center is set and no longer jiggles.
Remove from oven and cool completely at room temperature.
Step 5: Chill & Slice
Refrigerate for at least 2 hours for clean slicing.
Dust generously with powdered sugar before serving.
Slice with a sharp knife, wiping blade between cuts.