Grease 12 large muffin cups, 3x1 1/2 inches. Gently push fist into dough to deflate. Using about 1/4 cup dough each, make 12 balls; place in muffin cups. Using about 1 tablespoon dough each, make 12 smaller balls; place on top of each large ball. Cover and refrigerate at least 8 hours or overnight.