1. mix together the dry ingredients in a large mixing bowl
2. beat an egg in a measuring cup and add the vinegar. ;Add ice and then add enough water to equal just about 2 cups)
3. cut in the butter and shortening with a pastry blender (put them in the bowl as smaller chunks) (do not use your hands to mix as your hands will warm the dough too much)
4. Add the wet ingredients to the dry ingredients slowly until just moistened. ;Only add enough for the dough to come together.
5. Work quickly forming the dough into slightly flattened disks. ;Wrap in plastic and refrigerate until ready to use.
