You shouldn't make cakes with a toaster. Even if this toaster is super good, it is only suitable for making bread, not cakes.
There is a process of making a cake, that is, sending the egg whites. After the egg white is sent away, the plate won't fall off. This is why the cake is soft. After the egg white is mixed with other materials, you need to be careful at this time, and you can't use force, otherwise it will defoam. And your toaster can't be so smart, so you can't make a soft cake.