Finally, this is a chocolate and Nutella lover’s dream come true. Decadent, delicious, and so, so good! It may be rather small in diameter (18cm/7inches), but my, my, my. As this is a very tall cake (14cm), you can serve very small pieces and still serve a crowd. Let me introduce you to a chocolate cake with Nutella filling and frosting and a lot of blueberries.