1. In the bowl of a food processor, combine flour, salt, and sugar. Add the butter, and pulse until the mixture resembles small peas, 8 to 10 seconds.

2. With the machine running, add 1/4 cup ice water through the feed tube until the dough just starts to come together when you press it with your fingers. If necessary, add up to 2 more tablespoons ice water.

3. Divide dough into two equal balls. Flatten each ball into a disk, and wrap in plastic. Chill at least 1 hour. Dough may be frozen up to 1 month.