I want to experiment with making a savoury sponge cake. The idea is to make something that has the texture of a sponge cake but isn't sweet, and I'll fill it with some creamy savoury sauce that I haven't decided on yet. It's probably a daft idea (blame lockdown fever) and feel free to tell me so if you wish, but what I really want to know is can I take a recipe for a sponge cake and just leave out the sugar?
I want a fairly sturdy sponge. More like the texture of a light fruit cake sponge than a Madeira sponge. If it isn't just a matter of leaving out the sugar then any suggestions of recipes that will achieve what I want will be greatly appreciated.