01 -
Collect all required ingredients and measure them accurately for best results.
02 -
Preheat the oven to 350°F (175°C) to ensure even baking.
03 -
Line a 9×9 inch baking dish with parchment paper, leaving an overhang for easy removal. Optionally, grease the dish with butter or cooking spray.
04 -
Combine 1 ½ cups all-purpose flour, ½ cup granulated sugar, and ½ cup softened unsalted butter in a bowl. Mix until crumbly.
05 -
Spread the crumbly mixture evenly across the bottom of the prepared baking dish. Press firmly to form the crust.
06 -
Place the dish in the preheated oven and bake for 15-20 minutes until the crust turns light golden brown.
07 -
Whisk together 3 large eggs, 1 cup granulated sugar, ½ cup fresh lemon juice, 1 tablespoon lemon zest, ¼ cup all-purpose flour, and ½ teaspoon baking powder until smooth.
08 -
After removing the crust from the oven, pour the prepared lemon filling evenly over the hot crust.
09 -
Return the dish to the oven and bake for another 20-25 minutes until the lemon filling sets.
10 -
Allow the dish to cool completely on a wire rack. Using the parchment overhang, lift out the bars and cut them into squares.