¾cup12 tablespoons cold unsalted butter, cut into cubes
Lemon Filling
4large eggs
1cupgranulated sugar
2tablespoonspowdered sugar
¼cupall-purpose flour
⅛teaspoonsalt
⅔cuplemon juice
Zest from one lemon
Instructions
For the Crust
Preheat oven to 400º.
Lightly grease a 9x9-inch pan and then line it with parchment paper.
Mix together flour and sugar in a medium sized bowl.
Using a pastry dough cutter or two forks, cut butter into flour mixture until butter is the size of peas and mixed throughout.
Bake for 20 minutes until the edges are just beginning to brown.
While the crust is baking, prepare the lemon filling. You'll pour this in while the crust is still hot!
Lemon Filling
Whisk together the eggs and sugars and whisk until smooth. Add the flour and salt, then the lemon juice and zest, and whisk until thoroughly combined.
Let the filling sit while the crust is baking until the bubbles mostly disappear (about 10 minutes).
While the baked crust is still hot, pour the lemon topping over it. Return the bars to the oven and bake until they appear set and dry on top, about 30 minutes.
Remove the bars from the oven and place them on a wire cooling rack. Let them cool completely before slicing (at least an hour). Just before serving, sprinkle the top of the bars with powdered sugar.
Store any leftovers in the refrigerator for up to 4 days.