Cover with another sheet of parchment paper and roll out the dough to a rough 8-by-11-inch rectangle. Discard the top sheet of parchment. Trim the edges to form a 7-by-10-inch rectangle. Slide the dough along with the parchment onto a large baking sheet. Using a straight edge and a sharp knife, score the dough into 24 bars. Poke the dough all over with a fork and freeze until firm, about 10 minutes.