6 ounces Water, very cold (ice-water)
Add the ice-cold water and mix very fast with your hand just enough that the dough comes together. Cut the dough in half. The pieces of butter should still be visible. Refrigerate for 1 or 2 hours or use it right away. If you use it right away, the butter will be a bit soft, so you may need a little extra flour in the rolling process to absorb it.