In a large food processor
combine flour, salt, cinnamon and butter. Process until only small chunks remain. With food processor running on low, slowly add 1 Tbsp of ice water at a time. Continue processing until dough forms a smooth ball (you may need to increase speed to high, but it will come together). *Alternately dough may be made by hand in a large bowl with a pastry blender
or forks. If processing crust ingredients in one batch, divide dough in half.