I used chocolate liqueur however you can really substitute any flavour you'd like! I've also made this with Monin hazelnut syrup which adds a nice nutty flavour. Potential alternatives are cherry liqueur, vanilla syrup, or salted caramel. Marshmallow syrup can also be quite tricky to source, so skip if necessary - it's still delicious without! Feel free to experiment and report back!
Keyword Alcohol, Baileys, Chocolate, Christmas, Cocktail, Cream, Drinks, Festive, Marshmallow, Vodka