Whisk the flour, sugar and salt in a wide bowl.
Cut in the cold butter until flat pieces ranging from pea to almond size remain.
Stir the vinegar into 7 tablespoons ice water, drizzle it over the flour, and toss until the dough holds when squeezed, adding up to 2 tablespoons more water only to dry patches.
Divide the dough into 2 disks, wrap them, and refrigerate for at least 30 minutes before rolling.
For a fully baked single shell, roll one disk into a 12-inch circle, fit it in a 9-inch plate, crimp, chill for 20 minutes, line with parchment, and fill with the pie weights.
Bake at 375°F for 20 minutes, remove the weights and parchment, and bake for 8 to 10 minutes more until the bottom is dry and golden; use both chilled disks unbaked when a double-crust recipe directs.