Cooking thumb|Baking a basic yellow cake A cake can fail to bake properly, which is called "falling". In a cake that "falls", parts may sink or flatten, because it was baked at a temperature that is too low or too hot, when it has been underbaked and when placed in an oven that is too hot at the beginning of the baking process. The use of excessive amounts of sugar, flour, fat or leavening can also cause a cake to fall. A cake can also fall when subjected to cool air that enters an oven when the oven door is opened during the cooking process.
Cooking thumb|Baking a basic yellow cake A cake can fail to bake properly, which is called "falling". In a cake that "falls" parts may sink or flatten, because it was baked at a temperature that is too low or too hot, when it has been underbaked and when placed in an oven that is too hot at the beginning of the baking process. The use of excessive amounts of sugar, flour, fat or leavening can also cause a cake to fall. A cake can also fall when subjected to cool air that enters an oven when the oven door is opened during the cooking process.