Preheat the Oven: Begin by setting your oven to 350°F (175°C) and greasing a 9x13-inch baking pan to ensure easy removal later.

Make the Crust: In a mixing bowl, cream together your softened unsalted butter and granulated sugar until it’s light and fluffy. Gradually mix in the all-purpose flour and salt until the mixture resembles a crumbly dough.

Press the Crust: Evenly press this buttery mixture into the prepared baking pan to form a solid layer. Aim for a uniform thickness to ensure even baking.

Bake the Crust: Place the pan in the preheated oven and bake for 15-20 minutes. Look for a light golden color to ensure it’s just right; then, allow it to cool slightly.

Prepare the Filling: In a separate bowl, beat the eggs until frothy. Whisk in the granulated sugar, all-purpose flour, freshly squeezed lemon juice, and lemon zest until the mixture is smooth and well combined.

Combine Filling with Crust: Pour the luscious lemon filling over the cooled crust, spreading it evenly to cover every corner.

Bake Again: Return the pan to the oven and bake for another 20-25 minutes. The filling should be set but still slightly jiggle to the touch when done.

Cool Completely: Allow your lemon bars to cool at room temperature for 1-2 hours until fully set. Patience is key to perfect squares!

Cut and Serve: Once cooled, dust with powdered sugar if you’d like, and carefully cut into squares for serving.