Slicing tips: For clean slices, let the bars sit at room temperature for 5 minutes. Warm a large, sharp knife under warm (not hot) water, wipe it dry, and slice quickly. For extra-neat edges, wipe the knife clean between cuts. Avoid using a very hot knife, as it can melt the chocolate and smear it into the caramel.
Storage: Store in an airtight container in the fridge for up to 2 weeks or in the freezer for up to 1 month. Thaw before serving.
