Never Fail Pie Crust
["5 c. flour", "2 c. shortening", "1/2 stick margarine", "1 tsp. salt", "1 egg", "1 Tbsp. vinegar", "water to fill 1 c. measure"]
["Add liquid mixture to flour mixture.", "Mix until moist. Separate into 4 or 5 balls; freeze.", "Thaw when needed."]
["flour", "shortening", "margarine", "salt", "egg", "vinegar", "water"]