Directions

1. First, make the crust. Add the butter, flour, sugar, and salt to a food processor. Pulse until a sandy mixture forms and you can no longer see pieces of butter.
2. Put the processor on medium high speed and stream in the cold water until a ball forms that pulls away from the sides.
3. Transfer the dough to a lightly floured work surface and divide in 2 pieces. Wrap 1 piece in plastic wrap and freeze for later use. The other piece, roll out flat and transfer to a greased and floured 26 by 26 centimeter baking dish. Refrigerate until firm.