Blend the flour and butter together with a useful pastry cutter until it looks like flour again. Put on a show in the background or listen to some nice tunes and get a rhythm going...
Or, use a food processor with the steel blade and buzz the flour and butter in short bursts until the same result is achieved.
Add just enough of the ice cold water to make the flour mixture form a ball. Do not handle it any more than necessary.
Cut the dough into two pieces and form into a smooth ball. Refrigerate for at least 20 minutes.
Roll from the centre outwards until the dough is big enough to fill a 10" pie pan.