In a food processor, combine 2 ½ cups all-purpose flour, 2 tablespoons granulated sugar, and ½ teaspoon salt. Pulse until mixed.
Cut 1 cup of cold unsalted butter into small pieces. Add the butter to the food processor a few pieces at a time while it's running, until fully combined.
Add 3-4 tablespoons of ice water, one tablespoon at a time, until the dough forms a ball. If the dough is still dry after 4 tablespoons, add more water as needed.
Divide the dough into two portions. Form each portion into a flat disk, wrap in plastic wrap, and refrigerate for at least 2 hours or overnight.
When ready to make the pie, remove the dough from the fridge and let it sit at room temperature for 30 minutes.
On a well-floured surface, roll out the first piece of dough into a 10-inch circle. Fold the dough in half, then in half again, and transfer it to a pie pan. Press it into the bottom and up the sides of the pan.
Roll the edges of the dough towards the center and tuck them behind the rest of the dough to create a double layer. Press together to form a scalloped edge.
Poke a few holes in the bottom of the crust with a fork and place the crust in the fridge while you prepare the filling.