This recipe is based off one from Smitten Kitchen and is a favorite of everyone in our house. Make sure you keep these in the fridge and serve them cold. They are especially cute when placed inside of white muffin wrappers for serving individual slices.
For the crust:
1/2 pound butter, at room temperature
1/2 cup granulated sugar
2 cups flour
For the lemon layer:
6 extra-large eggs at room temperature
2 1/2 cups granulated sugar
2 tablespoons grated lemon zest (4 to 6 lemons)
1 cup freshly squeezed lemon juice
1 cup flour
Powdered sugar, for dusting
Preheat the oven to 350°F and grease a 9 by 13 by 2-inch baking sheet.
For the crust, cream the butter and sugar until light in the bowl of an electric mixer fitted with the paddle attachment. Combine the flour and salt and, with the mixer on low, add to the butter until just mixed. Dump the dough onto a well-floured board and gather into a ball. Flatten the dough with floured hands and press it into the greased baking sheet, building up a 1/2-inch edge on all sides. Chill.
Bake the crust for 15 to 20 minutes, until very lightly browned. Let cool on a wire rack. Leave the oven on.
For the lemon layer, whisk together the eggs, sugar, lemon zest, lemon juice, and flour. Pour over the crust and bake for 30 to 35 minutes, or about five minutes beyond the point where the filling is set. Let cool to room temperature, then refrigerate until cold. Cut into small squares and dust with powdered sugar before serving.
