In a medium mixing bowl, cream butter, sugar, baking soda, salt, cinnamon and cinnamon oil (if using). Beat in the egg and syrup. Add the flour and beat until smooth. Divide the dough in half and shape each half into a disk, like a hockey puck. Wrap and refrigerate for an hour or overnight.
Heat oven to 350 deg. F. Grease or line with parchment 2 baking sheets.
Roll the dough to 1/8" thick. Cut with a cookie cutter and transfer them to prepared baking sheets. Bake cookies for 12-13 minutes. (Cookies should be crisp, but not hard.) Remove cookies from the oven and transfer to a wire rack to cool completely.