How do they even make hamburger cakes?

So Jermaine Dupri posted this picture of his daughter, Shaniah’s 12th b-day cake…its a hamburger, which I think is totally cool, but how do they do this…well, I did some investigating!

global14.com

this is straight from coolest-birthday-cakes.com:

This hamburger cake was for my son’s 3rd birthday. We got the idea while looking for drum cake instructions. I loved the look of the ones I saw so I decided to make it my own.

I used a white cake mix and round pans that are about 5 inches in diameter. I filled them about 2/3 full for the top and bottom bun pieces. I then used the last bit of batter for the meat.

I found a recipe for peanut butter icing for the buns. I utilized the hump in the cakes for the rounded look of the bun (I still have not figured out how to not have the hump!) This turned out to be perfect for the color. I iced the bottom bun first and set it on the plate.

I then iced the meat with chocolate icing cause what goes better with peanut butter? After carefully placing this on the bottom bun I started to ice the top bun and ended up with white icing drops for the sesame seeds. Of course every hamburger needs ketchup mustard and lettuce. So I tinted some plain icing with red green and yellow to my liking. I used a Ziploc bag with a small corner snipped off for the ketchup and mustard. This was smaller than any of my icing tips. I then used the leaf tip for the lettuce.