400 gr. flour
200 gr. butter
Work the flour with the cold butter from the refrigerator, it is difficult to do by hands so I recommend you throw everything in the blender until the mixture is grainy. Then put the mixture in a cold surface (marble, steel or glass), add a pinch of salt. Work with hand adding cold water, to obtain a compact and elastic dough. Wrap everything in a transparent paper and let rest in refrigerator for at least 40 minutes before using.