In a stand mixer with the paddle attachment:
Add 1/4 cup sugar and 2.5 sticks cold butter cut into pieces. Whirl quickly.
Add shortening. Whirl quickly. You should have chunks of butter coated with sugar.
Add 3 1/4 cups all-purpose flour. Beat on low. You should get a crumbly mess.
Dump in 1/2 cup water that has been in the refrigerator. Whirl on medium just until it comes together.
Place dough in refrigerator for 1/2. Roll out, form, fill, and then bake at 375 until brown.