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Mix flour, sugar and salt in a food processor, by pulsing a few times. Scatter the frozen butter pieces over flour mixture. Pulse in 1-second pulses about 5 times to mix in butter.
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Add frozen shortening; pulsing in 1-second pulses until mixture resembles cornmeal with pieces about the size of peas.
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Slowly add ice water through the processor feed tube, with motor running, one tbsp at a time.
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When dough forms a ball, stop processing.
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It should take about 2 or 3 tbsp of ice water to reach this stage.
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Shape dough into a ball in your flour coated hands, and then flatten into a 4 inch wide disk. Flour disk and wrap in plastic. Refrigerate at least 30 minutes.
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Generously coat your work surface or pastry sheet with a little flour and about 1/4 cup graham cracker crumbs.
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Place dough on floured surface, coat with some flour and graham cracker crumbs, and roll into a 9-inch disk.
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Lift, coat surface with more graham and flour, turn dough, add more graham and flour on top, and roll out to a 13 inch disk.
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Place into a 9 inch pie pan, and finish edges. Refrigerate crust until firm, about 30 minutes. Prick dough with a fork to prevent bubbling up in the oven.
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While the oven is pre-heating to 375, put pie crust in freezer.
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Bake at 375 for 20- 25 minutes, checking occasionally to make sure it's browning evenly and not bubbling up.