Finely chop the dark chocolate
Melt the coconut oil using a double boiler
Add the dark chocolate to the melted oil and stir until fully melted
Add erythritol and stir well until dissolved
Add cocoa powder and salt, and mix evenly
Pour the batter into a mold and level it out
Chill in the refrigerator for at least 2 hours until set
Cut into bite-sized pieces