Makes pastry for five 9 inch pies

Combine flour, baking powder, salt, and sugar in a large bowl; cut in shortening with pastry blender until mix resembles coarse meal. Stir in egg, water, and vinegar. Divide dough into 5 equal parts; shape each into a ball and wrap tightly. Chill. May be stored up to 2 weeks in refrigerator.

To fit into a pie plate, roll each ball of dough to 1/8 inch thickness on a lightly floured surface. Place in a 9 inch pie plate; trim off excess pastry along edges. Fold edges under and flute.

For baked pastry shell, prick bottom and sides of pastry generously with a fork. Bake at 450°F for 10 - 12 minutes or until golden brown.