In a large mixing bowl, use a whisk to sift together flour, sugar and salt.
Using a pastry blender or a food processor, cut the cold butter and cold shortening into the flour until it resembles peas. (If using a food processor, pulse to combine in short bursts until it reaches your desired texture.)
Mix together cold water and vinegar. Add to flour mixture 1 Tbsp at a time pulsing until it comes together. (Test by squeezing a small portion of dough in your hand. If it holds together, then it's fully moistened.)
Turn out onto a lightly floured surface and roll into a smooth ball. Divide in half.
Form each half into a flattened disc. Wrap in plastic wrap and chill for at least 30 minutes or up to 2 days.
Remove one disc from the fridge. Sprinkle the counter lightly with flour. Use a floured rolling pin to roll into a 12-inch circle. Roll from the center to the edge turning 1/4 turn each time to keep the crust uniform in thickness.
Bake: Preheat oven to 375°F. Press crust into a 9 inch deep dish pie pan. Fold edge under, trimming any excess using a sharp knife. Use the thumb and forefinger method to flute the edge or the tines of a fork to make a design.
Dock the bottom of crust using a fork. Line with parchment paper or aluminum foil and fill with dry beans or pie weights.
Blind bake for 15 minutes until the edges are lightly golden brown. Remove the pie weights and continue to bake for 5-8 minutes or until bottom is lightly golden brown.
Remove from the oven and cool, then fill with your favorite pie filling.