so there are 2 eggs in the mix but still not sure if that will give enough lift with plain flour so that they don't turn out like bricks. Mind you I suppose if the cakes are too light they might just fall to pieces when I try to put the sticks in.
If there is no raising agent in the recipe such as bicarb, baking powder or egg then I would use self raising, otherwise go with plain. Agree that must be plain chocolate. I think by bark coating they mean the cooking chocolate that you melt to coat things with - but personally I think it tastes vile. I could be wrong of course - happens more than I'd like!