Put the flour, salt, and sugar in the food processor.
Cut the butter into small chunks and pulse until it is combined into a fine meal consistency.
Add ice water a tablespoon at a time and pulse until combined (it won’t look like pie crust, but will “smoosh” into it).
Pour out onto a piece of parchment or plastic wrap and squeeze into a ball.
Flatten to a disc shape and refrigerate for at least 20-30 minutes.
Roll out and place in pie pan. (I think the keys to a good crust are cold butter, ice water, and handling as little as possible.)