Just made this with Pikes Creek - was good- but not great - Tried again with a dash of normal Angostura plus the Orange bitters and was better more like a OF but still sweet will try with less Maple Syrup next around 7.5 ml
Try a more Rye forward Bourbon or it could be the lack on Angostura Bitters in this recipe. I like Old Forester which in my opinion makes a great old fashioned - must try with Maple Syrup, I normally go with Rich Syrup but might mix a batch..