1st choice black truffle juice
The truffle juice is extracted by canning. The fresh truffle during its first cooking will lose between 15 to 20% of its weight in juice.
All the flavors of the truffle are found in this slightly salty nectar.
To use for your sauce bases
Black truffle juice (Tuber melanosporum), salt
In a dry place away from heat.
Once opened, keep cool and consume quickly (Tip: You can then freeze the excess individually using an ice cube tray).