[gorush]

"How about making sponge cakes..."

Don't you need to borrow all of the ingredients in order to make a true sponge cake?

[rktman]

Not if you have a bunch of old sponges scattered around. Just put them in the blender with the eggs. Right? :>) (But not the ones with the scotch bright side!)

I did see on some show that the mineral oil method works for keeping them viable for a while.

[MountainDad]

Don't you need to borrow all of the ingredients in order to make a true sponge cake?

Lmao! Good one!