Cube cold butter and return to refrigerator. Fill glass with ice cubes and cold water. Measure all ingredients precisely.
Add flour, sugar, and salt to food processor bowl. Pulse 3-4 times to combine. If making by hand, whisk together in large bowl.
Add half the cold butter to flour mixture. Pulse 12-15 times until mixture resembles coarse meal with pea-sized pieces. Add remaining butter and pulse 8-10 more times, leaving larger butter pieces visible.
Add 6 tablespoons ice water (discard ice cubes). Pulse 5-6 times until dough begins to clump together. Add additional water one tablespoon at a time if needed. Stop as soon as dough starts coming together.
Turn crumbly mixture onto clean work surface. Gently gather together with hands, kneading just 2-3 times. Divide dough into two equal portions. Shape each into flat 1-inch thick disk. Avoid overworking.
Wrap each disk tightly in plastic wrap. Refrigerate for at least 1 hour or up to 3 days. For faster results, freeze for 30 minutes. Let refrigerated dough sit at room temperature for 10 minutes before rolling if very hard.
Lightly flour work surface and rolling pin. Roll dough from center outward. Rotate quarter turn after each roll. Roll to 12-13 inches diameter and ⅛-inch thickness. If edges crack, press together with fingers.
Roll dough around rolling pin. Position over 9-inch pie dish and gently unroll. Ease dough into dish without stretching. Press gently into corners and up sides. Trim excess to leave ½-inch overhang.
Fold overhanging dough under itself to create thicker rim. For fluted edge, place index finger on inside edge, use thumb and other index finger to pinch from outside. Alternatively, press with fork tines for simple finish.
For filled pies, add filling and bake according to recipe. For blind-baked crusts, prick bottom and sides with fork. Line with parchment and fill with pie weights. Chill prepared crust 15 minutes before baking.