If the hazelnuts are raw, they need to be toasted to really let their flavour pop. To toast them, place them on a baking sheet into an oven preheated to 350°F (180°C). Bake for 7-10 minutes, mixing them halfway. They are ready when the skin starts to separate and they are a very light golden colour underneath. Let them cool and wrap the hazelnuts in a kitchen towel. Rub the skins off and use