What Causes Cakes to Fall?
A number of factors during the mixing and baking process can cause cakes to fall. When cakes fall, however, all is not lost. You may be able to salvage part of the cake, or frost the cake creatively so that it can still look attractive. Even professional bakers experience a fallen cake or two now and then, due to subtle differences in air pressure, temperature, or the ingredients used. One of the most important things you can do to prevent falling cakes is to use fresh ingredients and to measure consistently.