The variant consists of crisp wafer and chocolate “enhanced” with caramel, cinnamon and spices, available in multi-packs of nine two-finger bars (£1.50).
Alicia Gardner, assistant brand manager for KitKat, said: “With its warming spiced caramel flavour, our newest two-finger KitKat is a delicious treat to enjoy with a hot drink this season.
“Inspired by the flavours of Speculoos, the tradition Belgian spiced cookie, this is a limited edition flavour, only available for winter months, so don’t forget to try some before they are gone.”