If you use normal sugar and whole hazelnuts: First mix the sugar into powdered sugar. Roast the hazelnuts, add them and work them into a smooth hazelnut butter.

Melt the chocolate in a water bath. Mix with the remaining ingredients in a food processor to a smooth mixture.

Now fill the still liquid Nutella into a clean container, close it and let it solidify slowly at room temperature. This can take 12-24 hours. If you don't want to wait that long, you can also let the Nutella set in the refrigerator.