Make the crust: In a medium bowl, whisk together the flour, sugar, and salt. Sprinkle the butter into the bowl and work it into the flour mixture using your fingers. Stop when the mixture looks like cornmeal studded with small chunks of butter. Sprinkle 6 tbsp ice water on top and stir with a fork until the dough begins to come together. If needed, add another tbsp or two of water. Pour the dough out onto a lightly floured surface and knead three times. Gather into a ball, then divide into two pieces, one slightly larger than the other, and press them into disks. Wrap in plastic wrap and refrigerate for 30 minutes.