Burgers are always popular to replicate as cakes. Just doing a Google search for "Burger Cakes" retrieves more than twenty-seven million results! Burgers are fairly simple, and great to start out with when replicating other food. Here's how mine came out:
Cute, huh? The cheese and lettuce are fondant, and the ketchup is buttercream colored red. And it took a lot of red. A lot. And it was still pink-ish. It's good enough for me though, it wasn't for a client.
If you want a burger cake your ketchup will be red!