Ahhh yes the princess cake! What little girl doesn't get a princess cake at some point in her birthday career?! We also have made the stand up princess cake but I can't seem to find the picture for it. You can make it with either ice cream or actual cake.
For the icecream version line your pan with saran wrap then scoop in the soft
icecream. Refreeze, then place your barbie half ( available at craft stores, or the bulk barn) and then, using icing tinted the color of your ice cream, put a top on your barbie! We used frozen whipped topping to pipe a loop around the bottom of the barbies dress to make her look a little more fancy.