Vinegar and egg!..Here is my Grandmothers recipe.
She was the best I ever saw making pastry,This is wonderful, but it is hard to handle! tender tender tender!
3 cups all purpose flour
1 tsp salt
Sift the above,cut in 1 1/4 cups Crisco.
Beat together and add,
1 egg
1 TBSP cold water
1 TBSP vinegar.
I have seen my Grandmother, Mrs Eva Powell, 1902-1988,roll out a sheet of this as big as a 9x13 pan, pick it up and fit it to the pan...and never tear it, I cant even get it in a 9 inch round pan !! I have to roll it on the rolling pin then unroll it in the pan, but it is the flakiest best tasting pastry you ever saw!
In the old days, she used lard, because they killed hogs every year.