This is from Cooks Illustrated. For someone who could not make a crust to save her life this is great. I used to buy the frozen ones. Plan ahead to have all ingredients cold, so you don't have to wait.
Process 1 1/2 cup flour, salt and sugar in food processor in short pulses to combine.
Add cold butter and shortening and pulse until a sticky dough starts to form and collects in uneven clumps. 15 seconds. (dough may resemble cottage cheese) Scrape bowl down and get all dough around the blade.
Add last cup of flour. and process for 5-6 pulses. Empty into med bowl.
Sprinkle wirh cold water and vodka. Using a spatula fold over until dough is a little tacky and sticks together. Divide in half and flatten each into a 4 " disk. Wrap in plactic wrap and refridgerate for at leat 45 minutes (or upto 2 days) before rolling out.