Tags: Food.
Blue cake (German: Blauer Kuchen) is a flaky pastry that is a specialty of the Frutig valley (the lower part of the Kander valley consisting of the municipalities of Aeschi Reichenbach Frutigen and Kandergrund) in the Bernese Oberland Switzerland. It consists only of puff pastry with no filling or other ingredients. Despite its name it is not blue.