Jakob was obsessed with Adventure Time when his 6th birthday rolled around* so of course I HAD to make him an Adventure Time-themed birthday cake. (The obsession lasted so long that he had 2 Adventure Time cakes AND Gunter-themed cupcakes for his birthday the following year as well!)

Step 1 was to make a fondant BMO. Luckily I’d already made myself a plastic canvas BMO that I could use for easy reference.

BMO was made out of white fondant tinted with gel colors, and had long toothpick inserted underneath while the fondant cube was still soft. After letting the pieces harden for a few days I drew on them with edible markers for the finer details.

I made the fondant toppers by tinting small amounts of fondant into the appropriate colors then cutting out scaled paper templates of each character. I used a fondant knife to trace and cut the appropriate sections of each color then adhered them with water and a clean food-only paintbrush. The last step was to draw on any fine details with the food markers. I then repeated the same process for the logo/sword, substituting Jakob’s name for the word “TIME” in the title.

I baked, stacked and decorated a cake to look like a lovely day in the land of Ooo then applied all the toppers (except BMO) to the sides of the cake, using the moisture of the fresh icing to adhere them. The pieces were juuuust soft enough to form slightly to the cake’s curves so they wouldn’t pop off.

Because of the weight factor, I waited until just before serving to add BMO on top and insert the number candle.

The cake was a hit, and totally mathematical!

Jakob’s other birthday cakes

• Jakob’s 1st birthday – printed cake
• Jakob’s 2nd birthday – Pirate cake and pirate cupcakes
• Jakob’s 3rd birthday #1 – Smarties Number 3 cake
• Jakob’s 3rd birthday #2 – Dinosaur cake
• Jakob’s 4th birthday – Pixar’s CARS cake
• Jakob’s 6th birthday – Adventure Time cake (this post)
• Jakob’s 7th birthday #1 – Gunter cupcakes
• Jakob’s 7th birthday #2 – Adventure Time BMO & Gunter cakes
• Jakob’s 8th birthday – Minecraft Creeper checkerboard cake
• Jakob’s 9th birthday #1 – Super Smash Bros Brawl – Ike cake

*There was no homemade cake for Jakob’s 5th birthday as it was included with the party experience.

This post may contain affiliate links. This means I might make a small commission on purchases made through the links, at no cost to you.