Move the mixture to a medium mixing bowl and add 4 tablespoons of the ice water. Start with 4 tablespoons and add from there. Using a rubber spatula, gently fold everything together. The crumbs should begin to form larger clusters. If you pinch some of the dough and it holds together nicely, it’s ready. If the dough falls apart, add 1-2 more tablespoons of water and continue to press until dough comes together.