Preheat oven to 350º F
Roast the hazelnuts: Spread the hazelnuts on a baking sheet in a single layer and pop into preheated oven. Roast for ~10-15 minutes until fragrant and the papery brown skins are starting to fall off.
Remove the hazelnut skins: Remove from the oven and transfer the hazelnuts to a clean kitchen towel. Let them cool a bit then rub to remove most of the skins.
Melt the chocolate: In the meantime, melt the vegan chocolate chips in the microwave (30 seconds at a time - stirring between) or on the stove in a double boiler until smooth and satiny.
Blend the hazelnuts: Place the hazelnuts into the bowl of a food processor (or blender) and start blending. Keep going until it's smooth and satiny stopping to scrap down the sides as needed. This should take ~2-4 minutes depending on how powerful your machine is. See photos in post.
Add remaining ingredients: Once the hazelnut butter is smooth and creamy, add in the vanilla, salt, and melted chocolate. Blend until well incorporated.
Taste and adjust: To make the Nutella sweeter, add a teaspoonful or two of maple syrup. Add another pinch of salt as needed.
Storing the Nutella: Transfer to a glass jar or container and store in the refrigerator or at room temperature.