Sponge cake Sponge cake Sponge cake is a cake based on flour (usually wheat flour), sugar, butter and eggs, and is sometimes leavened with baking powder. It has a firm yet well-aerated structure, similar to a sea sponge. In the United Kingdom a sponge cake is produced using the batter method, while in the US cakes made using the batter method are known as butter or pound cakes. Two common British batter-method sponge cakes are the layered Victoria sponge cake and Madeira cake. The Victorian creation of baking powder by English food manufacturer Alfred Bird in 1843 enabled the sponge to rise
Blue cake is baked. Blue cake is made only by professional bakers from a dough of flour, butter, water and salt. Several layers of butter are rolled into the dough with a special rolling machine ("tourage"), after which the dough is cut into roundels of pastry 6 cm thick and 25 cm or more in diameter. These are cut with decorative patterns, brushed with eggs and baked at 220 °C for 20 minutes. The mostly orally transmitted recipes differ among local bakers, who as of the 2000s are producing the cake in the third or fourth generation. The amount of butter used,