Place flour, sugar and salt into the bowl of a food processor and pulse a few times to combine.
Add cold diced butter and pulse the mixture until coarse crumbs form with some pea-sized pieces then stop mixing. Mixture should remain dry and powdery.
Add 6 Tbsp of ice water and pulse just until moist clumps or small balls form. Press a piece of dough between your finger tips and if the dough sticks together, you have added enough water. If not, add more water a teaspoon at a time. Be careful not to add too much water or the dough will be sticky and difficult to roll out.
Transfer dough to a clean surface, and gather dough together into a ball (it should not be smooth and DO NOT knead the dough). Divide dough in half and flatten to form 2 disks. Cover with plastic wrap and refrigerate 1 hour before using.