Cook each box of cake mix according to the package directions to make 2 circular cakes. In the end you should have 4 cakes total, although we’ll only be using 3 here.

Mix your brownie batter up and divide between two circular cake pans, the same size as the ones used to make the cakes. Cook according to package instructions.

Divide your frosting into 3 separate bowls. Use your food coloring and add into the frosting to make one bowl of each color, green, yellow, and orange.

Using a sharp knife, cut the crusty outer edges away from the cakes so they look for hamburger bun-like.

The bottom will obviously be a bun. So put one of your cakes down onto whatever surface you’ll be presenting the cake on. Top that with a brownie hamburger patty.

Spread/drizzle the different colored frosting’s over the ‘patty’, allowing some to run down the sides, to represent the lettuce, mustard, and secret sauce.

Top that with another cake ‘bun’ and another brownie ‘patty’. Repeat the frosting layer.

Top this with the last ‘bun’. Voila, you’ve got a cake-mac! I sprinkled on some sesame seeds for added effect, but that’s totally optional.