In the bowl of a food processor, add the flour, salt, and sugar. Pulse for few seconds. Add the butter and pulse for a few seconds at a time, until the mixture has a grainy texture. Add the ice-cold water. Pulse again, a few seconds at a time, adding a little water if necessary, until the dough just begins to form. Remove the dough from the food processor. Shape into a ball with your hands. Dust with flour and cover in plastic wrap. Refrigerate for 30 minutes.