1. Place toasted and skinned nuts in a food processor. Process until the nuts turn into a smooth paste (you may need to scrape the bowl a few times so all the nuts get ground up evenly...this takes a few minutes).

2. When the nuts have been processed into hazelnut butter, add the powdered sugar, cacao/cocoa and sea salt. Process again until smooth.

3. Add the oil and process once more. Your homemade nutella should now have a spreadable consistency.

4. Transfer your chocolate hazelnut spread to an airtight container. Storing it in the refrigerator will make it harden up and it won't be easy to spread, but that's the best place to store it if you want your homemade Nutella to last for a while. If you think it will get eaten up in a few days, you can store it at room temperature.