I have a lot of cake pans, but I don't have any shaped as a star. Strange, I know... But do you think that stopped me from making a star shaped cake? Well, I could have bought a star pan, but this way is a) cheaper, b) much more fun and c) you get cake scraps.
Start with 2 cakes (mine were apple & cinnamon), one slightly bigger than the other.
Get the bigger one and divide it in 6 huge slices.
Cut the 6 slices with a serrated knife.
Again with the serrated knife, cut the rounded edge of each cake piece, making perfect triangles.
Now get the smaller cake and divide it in 5, making a pentagon.
Cut the 5 ronded edges of the cake.
Get 5 of the 6 triangles and attach them to each side of the pentagon. There you have it: a star! Now all you have to do is to fill it (I've used dulce de leche) and decorate it as you like. By the way you can check my latest cakes here. I've used the extra slice to do that small round cake on top of the star, but you can use the scraps to do Bakerella's famous Cake Pops or go crazy like my friend Morgana and use Bakerella's technic to produce all kinds of cool shapes. Or of course, eat it, that's allways a perfectly good option.