Adapted from Cook's Illustrated, Published November 1, 2007
Step 1: Add 3/4 cups flour, salt, and sugar together in bowl and whisk until combined.
Step 2: Add butter and shortening. Using a pastry blender, mix until texture resembles coarse cornmeal with butter pieces no larger than the size of small peas.
Step 3: Sprinkle vodka and water over mixture. With rubber spatula, use folding motion to mix, pressing down on dough until dough is slightly tacky and sticks together.
Step 4: Flatten dough into 4-inch disk. Wrap in plastic wrap and refrigerate at least 45 minutes or up to 2 days.