Luebecker Nusstorte
A colleague of mine (you know who you are) asked for a recommendation regarding a trip to north Germany, and I ended up writing a praise for my hometown of Luebeck, along with the strong recommendation to try eating the Nusstorte in the Niederegger Cafe. I have to pass this along to everyone ;-) There is also a Korean language article about it. I personally tested the Nusstorte pictured below just recently during my Germany trip.