Technically, no. But you really should use either a food processor or blender for this recipe because it makes it not only easier but it evenly distributes the ingredients into the dough. It also allows you to work quicker so the butter doesn't start to melt and make a mess. If you opt for the by-hand method you can use a large mixing bowl (chill it in the refrigerator prior to using) and pastry cutter or your hands.