Most types of chocolate candy can be frozen, including chocolate truffles. However, some types of chocolate candy keep better than others, and discoloration can be an issue when freezing chocolate.
When chocolate candy is removed from the freezer, it can become discolored in a phenomenon known as bloom. Although bloom does not alter the taste, it does effect the presentation.
To help limit discoloration, chocolate truffles should be well wrapped and placed in an airtight container before freezing. Defrosting the chocolate while it’s still sealed also helps prevent bloom.
Truffles in particular tend to spoil quickly when left at room temperature. They typically need to be refrigerated and enjoyed within a week or so, and freezing is one way to help them last longer.