Baumkuchen, for its part, is an enormously popular pastry across Japan. The student’s idea to combine the two delicious baked goods has been turned into a new commercial product, now available ...

He settled on baking baumkuchen, using only flour from rice grown in the town, as a nod to his roots. Architect turned cake-maker Endou Kazuyoshi Endou says the rings of the baumkuchen represent ...