Preheat your oven to 180°C (350°F). Grease the baking pan lightly or line it with parchment paper. This helps the lemon squares come out easily after baking.

In a bowl, mix flour, butter and powdered sugar. Use your hands or a fork to combine until crumbly. Press the mixture evenly into the baking pan.

Place the crust in the oven and bake for 15–18 minutes. It should look lightly golden. Remove from oven and let it cool slightly before adding filling.

In another bowl, whisk eggs and sugar until smooth. Add flour, lemon juice, zest, and salt. Mix well until the batter becomes smooth and slightly thick.

Pour the lemon filling over the warm crust. Spread evenly with a spatula. This helps the filling cook evenly and form a smooth layer.

Return the pan to the oven and bake for 20–22 minutes. The filling should be set but slightly soft in the center when done.

Remove from oven and let it cool completely at room temperature. This step helps the filling firm up and makes slicing easier later.

Once cooled, dust the top with powdered sugar using a sifter. This adds sweetness and gives a beautiful finish to the dessert.

Cut into squares using a sharp knife. Serve fresh and enjoy your Martha Stewart Lemon Squares Recipe with family and friends.