I found this picture and put it on my desk top for the idea and can't remember where I found it. I should have bookmarked the page, DUH.
Anyway it's not hard to figure out that it is a Rice Krispie cake. Looks like a 9 in. springfoarm pan and a 8 in springfoarm pan. I would spray the sides of each pan with Butter Pam. Press in your Krispie treats into the pans let set up several minutes then release the sides and place on a cake dish. Decorate as you wish. The possibilities are endless