what type of cake keeps best the longest?

Hi – several questions relating to same thing really? 1) what type of cake keeps best the  longest. i.e  traditonal madeira,or  oil instead of butter based type cake. 2) which covering do you think the best – i.e. butter cream or ganache followed by sugarpaste. 3) how much in advance can you make and keep once … Continue reading what type of cake keeps best the longest?