I am no expert in making decorations but I have discovered there are a few products that make it all sooo easy. Lustre powders that you can turn into metallic paint with the addition of some gin or vodka, baking paper and the one product that will turn a trip to Snotfight into a pleasure, disposable icing bags.
These cakes turned out quite flat - in spite of having 2 teaspoons of baking powder to one cup of flour, which is twice the usual proportion, they really didn't rise into a nice curved top. I think this is because they are too big. Normally I make teency ones but these ones are muffin sized. So, by using a good firm butter icing, I made an initial 'pile in the middle:
then worked into the middle to form a wee Mt KauKau of icing.