1. Melt one tsp dark chocolate.
2. Place the coconut oil, one tablespoon each of unmelted white and dark chocolate, and microwave for one minute in the same container.
3. After thoroughly combining all ingredients, transfer the mixture onto a tray.
4. For one hour, place the tray in the freezer.
5. Dice the hazelnuts and incorporate them into the nut cream.
6. After distributing the mixture over the whole chocolate bar, freeze it for two hours.