I make a 1:1 brown sugar and cinnamon simple syrup that I use with Evan Williams bottled in bond to make a killer winter old fashioned. Couple of dabs of both orange and aromatic bitters and Italian cherries.
By the way, the simple sugar mix is 1 water to 1 brown sugar, and simmer with 3 cinnamon sticks for about 20 minutes. When storing, keep the cinnamon in the mix.