In the work bowl of a food processor, pulse flour and salt until combined. Add cold butter; pulse until mixture is crumbly and butter pieces are pea-size. With processor running, add ¼ cup (60 grams) ice water in a slow, steady stream just until dough comes together. (Mixture may appear crumbly but should be moist and hold together when pinched.) Add additional ice water, 1 tablespoon (15 grams) at a time, if needed.