I made a cake the other day for a 5th birthday party. The birthday girl loves Barbie and the colour purple, so her Mum asked for a purple Barbie cake :-)
I made a chocolate cake and sandwiched the layers together with raspberry jam.
I made the yellow 'flowers' that I used to decorate the cake, and I sprinkled over lots of edible glitter to make Barbie sparkle.
Apparently the birthday girl loved it, so I was thrilled.