The Old Fashioned Hot Toddy is an autumn cocktail that was created by author Jassy Davis and was first published in her book Winter Warmers: 60 Cosy Cocktails for Autumn & Winter. It's a version of the iconic Old Fashioned that uses the classic's template of whiskey, a sweetener, and citrus, but this variation calls for a honey syrup in place of simple syrup and warms up the ingredients using hot water in lieu of ice.
Add water to a saucepan and heat until boiling.
Add bourbon, honey syrup, aromatic bitters, and barrel-aged bitters to an Irish coffee mug.
Using a bar spoon, stir for 3-5 seconds.
Top with hot water.
Garnish with orange slice.