Break the dark chocolate into small pieces.
Melt coconut oil using a double boiler.
Add the dark chocolate and melt completely.
Add erythritol and mix well.
Add a variety of nuts such as walnuts, almonds, and hazelnuts.
Pour the mixture into a mold and spread it evenly.
Let it harden in the refrigerator for at least 1 hour.
Cut into appropriate sizes to serve.