Transfer unwrapped dough to a parchment-lined work surface. Flatten dough slightly with your hand, and then top with a second sheet of parchment. (Dust dough with flour if sticky.) Using a rolling pin, roll out dough between sheets of parchment to about 1/8-inch thickness; set aside. Remove plastic wrap from other dough half and repeat rolling process. Transfer dough, still sandwiched between parchment, to baking sheets and refrigerate until chilled, about 30 minutes.