Freezer Pie Dough

5 1/2 cups unsifted all-purpose flour
1 tablespoon salt
2 cups shortening
1 egg
1 tablespoon vinegar
1 teaspoon baking soda

Cut shortening into flour mixed with salt. In measuring cup, break egg; add vinegar and fill cup to top with cold water. Hold cup over bowl with flour mixture. Add the baking soda; stir and mix, then pour into flour. Mix with fork. Divide into 6 patties. Put into freezer bags and freeze.