2 c. all-purpose flour
1/2 tsp. salt
1/4 tsp. baking powder
2 tbsp. sugar
1/4 c. shortening
1/2 c. butter
About 9 tbsp. ice-cold water

Stir flour, salt, baking powder and sugar together. Cut in shortening and butter with pastry blender until mixture is crumbly. Add water, a little at a time, using just enough to bind mixture so that dough can be patted lightly to form a ball. Handle as little as possible. This makes enough for three 9 inch single shells.