Add flour, sugar, and butter into a food processor.
Pulse intermittently until the mixture reaches the size of small peas.
Gradually add in the ice water one tablespoon at a time while pulsing. Stop when the dough roughly comes together. Be sure not to overwork the dough. (You may or may not need all the water, depending on the humidity of the flour).
Dump the dough contents onto a large piece of parchment paper and press together to form a disc of dough.
Wrap the dough up with plastic wrap and place into the refrigerator for 1 hour to chill.
Preheat oven to 400°F/204°C.
Remove the dough from the refrigerator.
Lightly flour your work surface and rolling pin and roll the dough to a thickness of about ⅛". (Note: if the dough is too stiff, let it rest at room temperature for 15 minutes).
Transfer the rolled out dough to a tart pan with a removable bottom.
Press in the dough on the bottom and up along the sides so it's even.
Place the crust into the freezer for 15 minutes to chill. Chilling helps prevent too much shrinkage when it gets baked.
When ready to bake, remove tart from the freezer.
Prick the dough with the tines of a fork.
Place a crumpled piece of parchment paper on top of the tart dough and add pie weights on top of the parchment (or use dried beans, rice, etc).
Bake at 400°F/204°C for 15 mins.
Remove the parchment paper and pie weights from the tart, and continue baking for another 15 mins.
Remove from oven and let it cool completely before filling.