Andrew and I spent last weekend creating an Optimus Prime cake in celebration of the new Transformers movie that opens July 2nd. Andrew already has a ticket for the first show! Alas, I’ll be in class that night, and will need to see it with him the following day. You can see more pictures and video on his website.
For those of you who are interested (or just plain insane?) and might like to try this yourself, I offer you a basic rundown of the creation below. Note, I recommend at least a fair amount of baking and fondant experience prior to attempting this project. We are certainly classified as amatuers in the cake arena, but it was a fun project nonetheless. Yeah, so the tires are flat. You try making tires out of cake and fondant! (Send me pictures, if you do!)
Goal: Bring Optimus Prime to Life
Model: 1984 Optimus Prime Transformer
Scale: 1:3.2
Cost: $85.00
Planning Time: 4 hours (1 amatuer planner)
Baking Time: 22 hours (2 amatuer bakers)
Ingredients
- 9 8″ square white cakes, baked and frozen
- 3 batches of buttercream icing
- 5 pounds of white fondant
- 1 bag Oreo cookies
- 5 12″ dowel rods
- 3 cans black color mist
- 2 cans red color mist
- 1 can blue color mist
- 2 bottles silver luster dust
- 1/2 cup clear vodka
- 4 13×19 cake boards
- 4 feet thin silver wire
- 1 pack edible ink writers
Accessories
- electric carving knife
- dough scraper/cutter
- paint brush
- icing spatula
- cake leveler
- circle cookie cutter
- lazy susan
- tiny bowls for silver paint
- rolling cutter
- exacto knife
- yellow electrical tape (optional)
- lots of space in your freezer
- endless patience
- good shoes (for standing in the kitchen)
Basic Directions
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Photo
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Directions
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Bake all 9 of the 8″ square cakes, leaving out 1/4 cup of water each to make them more dense, and freeze in multiple layers of plastic wrap |

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Cab – Level and stack 3 pairs (6 cakes total) with dowels and boards in between, cutting out the front wheel wells – this part is the trickiest!
Bed – Level and stack 1 pair (1 cake in half) on a board
Tail Lights – Level and stack cake pieces from the 8th cake to form feet/tail lights |
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Crumb coat everything and freeze
Ice each piece again so fondant can stick |
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Roll and apply fondant to each of the pieces – the Cab, the Bed the Tail lights, and all six wheels |
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Cut window shapes out of the cab – be careful, you’ll need to put them back later |
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Use cutter, knife and other tools to create markings on the side of the cab and the back of the tail lights
Use fondant to mold roof accents and attach with clear vanilla extract and a paint brush
Spray the pieces – Cab is red, Bed is blue, Tail lights are blue, windows and wheels are black (Hint: spray black twice under the blue to make it darker)
Use fondant to mold roof accents, grill, bumper, headlights, icons, and exhaust stacks (wrapped around dowels for stability); freeze for easier handling |
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Use Oreo cookie pieces, discarding (or eating!) the center creme – stick 10 cookie sides together with royal icing and paint silver, then freeze to harden |
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Paint the miscellaneous pieces to match the toy’s various details with silver luster, red and black markers
Cover one 13×19 cake board with aluminum foil and use yellow tape to make lane markings (optional)
Place the pieces together on the large cake board – you might use a second 13×19 cake board underneath for added strength |
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Use stiffened buttercream to attach the pieces to the cab, and the wire to help hold on the exhaust stacks |
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Complete any final touches, then take pictures and show all your friends how much of a geek you are! |
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Eat cake (yum!) |
So there you have it. Please, promise me if you try this cake (or anything like it) that you’ll send me a picture! I’d love to see your work of art. If you are interested in the Excel spreadsheet with all the calculated measurements and ratio adjustments, just leave a comment below and I’ll post it for you. Good luck!
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This is incredible – wow – what an achievement! Excellent job all around!!!
That’s looks fantastic! I’d be interested in the spreadsheet, as I plan to attempt this cake later this year. (I’m currently working on plans for a star destroyer cake, and that’s taking up most of my free time *g*)
GREAT looking cake!!
I would love to have this details of this cake since I’m going to try and do it for my Husband’s birthday at the end of the month. His such a Transformer’s Geek!!
Thanks A Lot! Katie
I would love to try this cake. You guys did an incredible job.
May I see the spreadsheet for calculations?
Thanks, Christine
very nice cake…could u email me the spreadsheet? i hope i could do one for my son’s birthday. thanks a lot.
You can find the spreadsheet calculations, the photos and step-by-step instructions at my husband’s website:
http://www.floatingcat.com/info.php?id=189
Thanks!!
Jessica
I am currently making one similar to yours. it is for this saturday! My son just turned 5 today and is goo goo for transformers! I saw this and got my idea from it. I will post a pic or send to you when we complete it. We are not using fondant though. Doing an angel cream for the cab and a 9×13 funfetti for the trailer. cookies for the wheels, nestle crunch sticks for the smokestacks and of course “painting” it different colors and drawing on the grill, etc…My cake plate I decorated to look like a blacktop highway. Has yellow lines down the middle of it. I just didn’t have 22 hours to devote to this…But I am impressed by your patience! I hate storeboughten stuff, so I am glad I saw this site for a fun idea! THANKS.
That’s increadible! I don’t think that a pro could have done it in less time. Great job!
This is a great cake. I am going to try to make it and would be interested in receiving the measurement for it.
I would love the calculations if they are still available!
Thanks!!
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