Add flour and salt to a food processor fitted with the blade attachment. Pulse until evenly incorporated.

Add the butter and shortening cubes, a few pieces at a time with the motor running, until all fats are incorporated and pea-sized clumps begin to form. Slowly drizzle in a ½ cup of water, pulsing all the while.

Transfer the mixture to a mixing bowl and knead until the mixture comes together. (If you do not have a food processor, use a pastry blender and a large mixing bowl to cut in the fats, and a sturdy wooden spoon to stir in the water.)

Cut the dough ball in half using a knife or a pastry cutter, and form into two flattened round disks. Wrap in plastic wrap and place in the refrigerator until chilled through, at least 2 hours.