Lemon mudcake anyone?

Black and Gold brand, as sold in IGA supermarkets in Australia, have been, maybe still are, selling "self-raising flour" that apparently has no raising agent in it. This is a big problem, because if you bake with this stuff you will not only have wasted money buying a sub-standard product, you will also have wasted money spent on all the other cake ingredients, and wasted time baking the cake, and wasted the opportunity to have the cake that you planned. I recently invented the lemon mudcake. I never intended to invent the lemon mudcake!