Pound cake For instance, baking soda or baking powder may be incorporated to induce leavening during baking, resulting in a less dense pound cake. A cooking oil (typically a vegetable oil) is sometimes substituted for some or all of the butter, which is intended to produce a moister cake. Sour cream pound cake is a popular variation in the United States, which involves the substitution of sour cream for some of the butter, which also is intended to produce a moister cake with a tangy flavor. Some of these variations may drastically change the texture and flavor of the pound cake, but
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,