Toast hazelnuts in a frying pan set over medium heat for approx. 5 min. Transfer hot hazelnuts to a kitchen towel. Rub together to peel nuts. Transfer skinned hazelnuts to a food processor and blend for approx. 10 min., or until creamy.
Transfer chocolate to a heatproof bowl set over a saucepan filled with simmering water, Melt chocolate, stirring occasionally. Allow to cool down for approx. 5 min. Add blended hazelnuts, melted chocolate, neutral oil, confectioner’s sugar, cocoa powder, and vanilla extract to a mixing bowl. Using a stand mixer or hand mixer with beaters, stir until combined. Transfer chocolate-hazelnut spread into a mason jar. Enjoy!