The classic flavour of Hazelnuts is a must for the pastry kitchen. Create full-bodied nut pastry fillings, flavoured ganache fillings for chocolates with hazel nut oil. Nut oils can be used in many applications where you would use extra virgin olive oil. Try using hazelnut oil in place of a small portion of the oil used in mayonnaise or in place of some of the oil used in a salad dressing.