In a separate medium bowl, or in the bowl of an electric mixer, beat the butter with the sugar, salt and rosewater, until smooth and creamy, about a minute. Add the flour mixture and mix until barely combined. Scrape the dough into a ball, and if you feel like it needs to come together a bit more, knead it once or twice on the counter top, or until it is smooth. Shape into a round, flat patty shape wrap tightly in plastic, and refrigerate for a couple hours, or overnight.
