"This was one of the best cakes I've ever eaten, though I made a couple of alterations. I chopped up four Skor bars along with about 1/2 cup of chopped hazelnuts for the filling, rather than making the crunch from scratch. I used a "Dark Chocolate Fudge" box cake mix, & made it with coffee instead of water. Instead of making a layered cake, I used a Bundt pan. Everybody at my party loved it. It's kind of expensive to make, due to the hazelnuts and two packages of mascarpone, but it's worth it for a special occasion. I'll probably make this again for the holidays. I recommend storing this in the fridge.