Begin by mixing together your flours, sugar, salt and cinnamon in a large mixing bowl.
2 cups all purpose flour, ½ cup bread flour, ¼ teaspoon salt, 2 teaspoon ground cinnamon, 3 tablespoon superfine granulated sugar
Work in your butter. I do this by adding the chopped pieces and then rubbing with my fingers until you've worked the butter into the dry ingredients. You're not looking for this to be mixed so thoroughly that you can no longer see any flecks of butter. A coarse mixture with some still obvious blobs of butter will actually add to the flakiness of the finish.
1 cup unsalted butter
Slowly add your water. I start with about ¼ cup and then mix together, kneading lightly and adding a bit more water (a few teaspoons at a time) until it comes together as a dough. Avoid overadding water and overworking the dough since this can result in a tougher, less flakey consistency when baked.
⅓ cup cold water
Divide the dough into two balls and wrap with plastic wrap. Lightly flatten these rounds for easier rolling when the time comes. Place in the fridge for at least 2 hours to chill thoroughly.
After 2 hours, remove a dough ball from the fridge, working one at a time (leave the other in the fridge to avoid it warming up too much). Roll this out on a floured work surface until you have a large round, roughly ¼" thick.
With the first of your dough rounds, gently place into your pie plate, pressing into the corners to line the base and sides of the pan. It should overhang about an inch all around. Place the dough lined pie plate in the refrigerator to continue chilling while you're finishing your filling (if not ready to bake yet!).
Your second dough round can be rolled out in advance and chilled on a cookie sheet as a large flat crust (this will be your top crust for the pie). Or, you can leave the dough in the refrigerator unrolled until your filling is ready and you're about to put it all together for baking.