Now a specialty of Nagasaki, the cake was brought to Japan by Portuguese merchants in the 16th century. The name is derived from Portuguese Pão de Castela, meaning bread from Castile. Castella cake is usually sold in long boxes, with the cake inside being approximately 27 cm long.
What does castella mean in English?
The name is derived from Portuguese Pão de Castela, meaning “bread from Castile”. Castella is made of just 4 basic ingredients: bread flour, eggs, sugar, and honey. A dark brown top and bottom crusts with a creamy yellow center give a beautiful contrast to the sponge cake.
Why does my cake crack on top?
The oven temperature is too high. If the top crust forms and sets before the cake has finished rising, the middle will try to push through the crust as it continues to bake, causing it to crack and possibly dome. Check your oven with an oven thermometer and reduce the temperature accordingly if it is running hot.