Heat oven to 375°F. Line cookie sheet with sides or 15x10x1-inch pan with cooking parchment paper or foil. In medium bowl, mix 1 cup flour and the salt. Using pastry blender (or pulling 2 tables knives through ingredients in opposite directions), cut in shortening until particles are size of small peas. Sprinkle with cold water, 1 tablespoon at a time, tossing with fork until all flour is moistened and pastry almost leaves side of bowl (if necessary, 1 to 2 teaspoons more water can be added).