Step 1

1.Preheat oven to 350 degrees and line a 9x13 inch baking dish with parchment paper.

Step 2

2.Add the flour and and powdered sugar to the bowl of a food processor. Pulse to mix then add the butter and pulse until combined and the dough starts to form into a ball.

Step 3

3.Remove the dough from the food processor and press into the bottom of the prepared pan, spreading it out evenly and to the edges. Bake at 350 degrees for 18-20 minutes or until the edges are slightly golden.

Step 4

4.To make the filling, whisk together the eggs, granulated sugar, lemon zest, lemon juice, and flour until completely combined. Pour over the baked crust and bake at 350 degrees for 25-30 minutes or until the edges are set and middle is still slightly jiggly.

Step 5

5.Cool completely on a wire rack then refrigerate at least 2 hours or even overnight. Cut into 36 squares and serve at room temperature. Dust with additional powdered sugar before serving.