Hazelnut Cheesecake is absolutely rich, decadent and delicious, with a rich hazelnut flavor from top to bottom, starting with the hazelnut crust, hazelnut filling, and a few hazelnuts sprinkled on top as garnish. This recipe uses over 2 cups of hazelnuts including the crust, filling, and garnish. Toast and remove the skins for the entire recipe as the first step, then all the nuts will be ready for use.