If you have not tasted the « Merveilleux », it is a sin ! The cake is simply made of meringue and buttercream (6 different flavours), not exactly what you would dream on to go on a diet. But the merveilleux is smashing for a birthday cake and surprisingly light. I had one for my vampire party, last March. I advise you take less portions than necessary. There are 5 shops in Paris, one in Brussels and two in South West London, enjoy with almost not guilt.