Olive Nation organic hazelnut extract is a great way to add the pure taste of hazelnuts to your recipes. It is naturally gluten-free and certified Kosher. Hazelnut extract can be used in cakes, cookies, frostings and icings. Use it to make homemade hazelnut ice cream. Three ounces is enough to flavor five gallons of ice cream. Try adding 1 teaspoon of hazelnut extract to your favorite yellow cake mix. Blend the ingredients and bake per the cake's directions, frost with chocolate buttercream icing to make a delicious chocolate-hazelnut cake. How to Make Hazelnut Flavored Coffee Hazelnut extract is perfect for making hazelnut flavored coffees and lattes. It can be added directly to brewed coffee or sprayed on the beans prior to grinding. Add 1/2 teaspoon of hazelnut extract to flavor 10 - 12 cups. of brewed coffee. When applying to the whole coffee beans, use it at a level of approximately 3.00% by weight.