This is truly a one bowl cake and it is gooey, fudgey and moist inside. One thing though and that is do make sure that you use the best quality chocolate you can find. You could also make it gluten free by substituting the plain flour for a gluten free flour like chestnut flour. It's certainly the star ingredient here and with a little shake of cocoa it will transform you into a domestic goddess. Everyone should have a go to one bowl chocolate cake up their sleeve.