Baking thoughts, techniques and know-how

Deflating sponge cake
16 Sep 2019 - Anneka Manning

Q: Why did my sponge cake deflate halfway through baking?

A: Because sponge cakes are based on a high proportion of eggs (which gives them a relatively flexible structure) and they contain a large amount of air, when they cool after baking they do deflate more than other types of cakes – if you watch carefully you will notice them pulling away from the sides of the tin and losing some of their height almost immediately after they are removed from the oven.