In your food processor, combine flour, sugar, salt and butter and pulse until the mixture looks like a coarse meal. Make sure you don't have large clumps of butter, you want to have pebbles of butter throughout.
Using long pulses, slowly add in the cold water and pulse until the dough comes together. Test the dough by squeezing some together. If it does not come together, add a little more water - pulse and try again.
On a lightly floured surface, turn out the dough and form into a rough ball. We don't want to add too much flour or overwork the dough. Cut the dough ball in half. For each half - flatten with the heel of your hand, folded in half, fold in the quarter and flatten again. Repeat once more and knead back onto a ball. Repeat this process with the second half.
Flatten each half into a 5-inch disc and lightly flour each side. Tightly wrap in plastic wrap and place in the fridge for at least an hour.
On a well-floured surface, roll out one disc of dough into an 11-inch circle - start in the center and roll out in all directions. Lightly flour your rolling pin and roll the dough around it and unroll it over the pie dish.
Gently press the dough into the dish, crimping the edges. You can repeat this with the second dough or use the second disc for another dish.
Wrap shells in plastic wrap and refrigerate them while you make your filling. Best to refrigerate for at least 3 hours or overnight - but I have used the shell right away without refrigerating it and it still comes out. You can freeze the shells for up to a month and use them later.