In a large bowl, whisk together the flour and sugar. Add the butter. Using your hands, two forks or a pastry blender, cut the butter into the flour mixture until it is the size of peas. They won’t all be uniform in size, but that’s okay: you want to avoid warming up the butter too much.
Add the ice water all at once and gently knead the dough until it just comes together (I repeat: Do not overwork the dough!).
With floured hands, divide the dough in half. Form into two disks, wrap each disk tightly in plastic wrap and chill in the fridge for at least 1 hour.
When you’re ready to roll the dough, take the disks out of the fridge and let them rest on the countertop for at least 15 minutes, to take the chill off them. If you roll out cold dough, it will crack and leak.
Lightly flour a clean work surface and roll out one of the disks to a 13-inch- diameter circle. Transfer to a 9-inch pie plate and trim the edges to fit the plate. For a double crust recipe: Roll out the second piece of pastry to a 13-inch diameter circle and place in the fridge to chill while you prepare the filling.
Preheat the oven to 400°F.