Mary Berry, who isn’t afraid of changing up a classic recipe, seems to think the original approach needn’t be tampered with.

This is not a classic sponge cake. One addition makes it slightly heavier and slices well into multiple layers. This type of ...

Doing this gives you a smooth surface and the best results for the finished sponge cake. Baking powder plays an essential role in helping to make the cake fluffy and light, do not forget to add it.