My Grandma Zalia's Fool Proof Pie Crust

4 cups flour

1 3/4 cup shortening

1 Tbs. sugar

2 tsp. salt

Mix in mixer  

Then add:

1 egg

1 Tbs. vinegar

1/3 cup ice water

Mix and let set in refrigerator an hour before using.  Makes two 9 inch pie crust bottoms.