Add flour, salt and the 2 ½ cups of cold crisco to a mixing bowl. Crack the egg into a measuring cup, add 1 teaspoon of vinegar and fill the cup to the one cup mark.
Use a fork or pastry cutter to work the ingredients into a dough. Do not handle any more than possible. Your hands will heat the shortening in the dough and affect the crust.
Once mixed, divide into 6 balls and at this point you can freeze them. Simply thaw to use.
