Preheat your oven to 400°f Mix your graham cracker crumbs and butter, then spread across evenly in a springform cake pan. Use a food processor to blend your hazelnuts until the butter forms In a large bowl, whip your cream cheese, hazelnut butter, melted chocolate, sugar and vanilla extract until fluffy Add in your eggs and heavy cream, mix until smooth and creamy Pour your cheesecake mix into the prepared crust and bake for 40 minutes! Let cool completely and refrigerate over night Slice, serve and enjoy!