1. In a food processor, pulse flour and salt to combine. Add butter; pulse until mixture resembles coarse meal, with a few pea-size pieces of butter remaining. Sprinkle with 2 tablespoons ice water; pulse until dough is crumbly but holds together when squeezed (if necessary, add up to 2 tablespoons more water, 1 tablespoon at a time). Form dough into a 1-inch-thick rectangle, wrap tightly in plastic, and refrigerate until firm, 1 hour (or up to 3 days).