In a saucepan, place the ketchup, cider vinegar, muscovado sugar, tomato puree, Worcestershire sauce, smoked paprika, tabasco, orange juice, whiskey, garlic. Bring to the boil and simmer for 3-4 minutes until the sugar have dissolved and the sauce is glossy.
Remove from the heat, transfer to a jar or a bowl, and leave to cool.
Store, covered, in the fridge for a few days or in a sterilized jar for 2 months.
Notes
If you are not a fan of whisky, you can easily omit from the sauce.