1 cup butter unsalted chilled cut into 1/2-inch cubes ()
Equipment
ziploc bags
Directions
Blend flour, sugar, and salt in processor.
Add butter; using on/off turns, process until coarse meal forms.
Add 8 tablespoons ice water and cider vinegar; blend until moist clumps form, adding more ice water by teaspoonfuls if dough is dry. Gather dough together. Turn dough out onto work surface; divide dough in half. Form each half into ball and flatten into disk. Wrap disks separately in plastic; refrigerate at least 1 hour. (Can be made ahead. Keep dough refrigerated up to 2 days, or enclose in resealable plastic bag and freeze up to 1 month, then thaw in refrigerator overnight. Soften slightly at room temperature before rolling out.)
