In a food processor, combine the flour, butter, sugar and a pinch of salt. Pulse until the mixture resembles coarse meal and transfer to a bowl. Add 2 tablespoons of the cold water and toss gently with a fork; add up to 1 more tablespoon of water if the dough seems dry. Gather the dough into a ball and flatten slightly. Wrap in wax paper and refrigerate for at least 1 hour.