In a food processor fitted with a steel blade, add the flour, salt, and sugar. Pulse a few times to mix.
Add the butter and shortening. Pulse until the butter is about the size of peas.
With the machine on low, pour the ice water down the feed tube and pulse until the dough begins to form into a ball.
Then, place the dough onto a floured surface and roll into a ball. If you still have some dry flour, just sprinkle a little more water onto it until it combines with the rest of the ball.
Cut the dough in half (for a pie with a top and a bottom crust) or leave it whole. Wrap the dough in plastic wrap and refrigerate for at least thirty minutes.