I'd like to attempt to make a cookie monster cake. I see a lot of people make it using the cuddly bear stand up cake pan, but my brother suggested making the head & body out of rice krispy treat. It will be sitting on a cake base, so it does not have to be edible. Those of you with experience, what would be simpler ? Thank you!

Hands down for me the RKT. You make the mixture and mold, ice it with bc and sit it on a cake. Decorate the sides of the cake and done! IMHO.