1 tsp. orange marmalade
3-4 dashes Angostura bitters
60ml rye whiskey
slice orange peel
- mix marmalade, bitters, and 20ml of the whiskey in a tumbler
- add ice and remaining whiskey, and stir
- garnish with orange peel
source: https://www.theguardian.com/food/2023/feb/03/cocktail-of-the-week-the-thin-white-duke-ooh-fashion-ed-old-fashioned-bowie-recipe-whisky-marmalade