Once combined, mix in the flour and add the ice water one tablespoon at a time. The dough should hold together but crumble apart if you break it up in your hand. If it seems too dry, add a little more ice water.
Separate dough into two halves and pack together into discs. Wrap in parchment paper and chill in the refrigerator for 30 minutes.
Place the separated crackers on a parchment paper-lined baking sheet. Bake for 13 minutes, or until golden brown.