Lemon Bars

Preheat oven to 350 degrees fahrenheit.

Make the dough: Combine flour, sugar, cornstarch, and salt in a bowl. Add butter. Use a fork to cut in butter until dough resembles coarse crumbs.

Press mixture onto the bottom of a 9x9-inch square pan lined with parchment paper. Chill in the refrigerator for 30 minutes.

Bake in the preheated oven for 20 minutes or until lightly browned.

Meanwhile, make the filling: Mix together flour, baking powder, and lemon juice. In a separate bowl, combine eggs, sugar and lemon zest. Add the flour mixture to the egg mixture; stir until well combined.

Pour mixture over the pre-baked crust and bake in a 350 degree fahrenheit oven for another 25 to 30 minutes. Let cool in the pan until set, about 3 to 4 hours.

Slice into 25 squares. Dust tops with confectioners' sugar.