Heat oven to 375 degrees F. Lightly grease cookie sheet with shortening.
Sprinkle a clean surface with sugar. On sugared surface, roll pastry sheets into 12X9 1/2 inch rectangle that is 1/8 inch thick. Mark a line lengthwise down center of pastry rectangle. Fold long sides of rectangle towards the centerline, leaving 1/4 inch uncovered at center.
Fold rectangle lengthwise in half, pressing pastry together to form a strip, 12X2 1/2 inches. Cut strip crosswise into 1/4 inch slices.
Mix sugar and cinnamon together in a small bowl.
Dip slices in sugar mixture to coat both sides.
Put slices about 2 inches apart on cookie sheet. Bake 8-10 minutes, turning after 5 minutes, until cookies begin to turn golden brown. Immediately remove cookies to wire rack to cool. (makes about 48 cookies)