For the dough
Mix together 6 tablespoons of ice cold water and 2 teaspoons of apple cider vinegar. Sprinkle over the flour mixture in 1 tablespoon increments, fluffing with a fork between applications until the pastry is moist enough to hold together. You may add up to 2 more tablespoons of plain ice cold water if 6 is not enough.
For the toaster pastries