Mar 202013

My grandson loves Lego’s, so I surprised him with this Birthday cake.  I found many creative ideas for Lego cakes on

Lego CakeOne clever idea in this website, was to tape bubble wrap to the tray.  Spreading the frosting on the bubble wrap was made easy by thinning a can of white frosting with some milk and green food coloring.  I poured the frosting on and then spread it with a knife.  Removal was done by kids licking fingers.

I baked two Betty Crocker chocolate cakes (his favorite) in 9 x 13 size pans. The cooled cakes were cut into thirds and then into halves for different sizes. The ½ sizes can be cut in ½ again for the very smallest size.  Each Lego is 2 layers high for the largest sizes.  Note: This is where I had a problem with the moist cakes becoming sagging Legos.  I’ve since learned to wrap tin foil around carboard pieces and insert them between the layers to stabilize the leaning tower look.

I froze the cake pieces, so the cut edges frosted easily with less crumbling (a professional cake baker tip).  I then cut large marshmallows in half and frosted them for the Lego tops (another neat idea from the website).  Although fondant icing would give a finished look and frosting the sides smooth took longer, the taste was worth it.

The little Lego guy is made from Rice Krispie treats. The bars mold easily and stick together perfectly.  I cut ½-bar for the body and ½-bar to make the two legs.  Another bar was cut up to shape a round head, two arms and feet.  I used colored fondant to cover him and Wilton FoodWriter pens to draw fine lines for the eyes and other details.

Please let me know if you have any questions for creating this fun cake.

  30 Responses to “Lego Birthday Cake”

  1. Hi Neva. Thanks for your email – I love discovering great new blogs!

    That birthday cake looks amazing – I know from experience that creating Lego birthday cakes is harder than it looks. 🙂


  2. Thanks Angela.

  3. that looks awesome!

  4. That cake is amazing. My son would love it!

    • Thanks so much and if your son would like a free Lego magazine, please read my post in Discounts. Kids love getting their own mail.

  5. OMG what a cake! That is the ultimate VIP celebrity birthday cake! It is clear I need to raise my bar if I’m going to compete with that! Well done!

    • Thanks so much for your kind words. The fact that your child knows the birthday cake is what he wished for, will make it very VIP worthy. Keep up the good work on your blog, I love it.

  6. The cake looks amazing! Thanks for sharing the website. I just done I post on Birthday present Ideas and there is a picture of a pirate ship cake I made for my nephew. Feel free to check it out and let me know what you think 🙂

  7. Shannon, your pirate ship cake is so special and gorgeous. I’m sure he felt very special, since you made the cake that he wished for. Great job on your blog and I look forward to following you too.

  8. I love the Lego cake – very professional. I can feel the love! Thanks for your Comment on my blog. I’ll look forward to following your blog.

    • Thanks so much and if any of your grandchildren would like a free Lego magazine, please read my post in Discounts. Also, as you know, kids love getting their own mail.

  9. How adorable!! I’ll give it a try next month for my sons birthday!!

  10. Okay I love this. My son loves legos and this would be so perfect for his birthday cake! Thank you for sharing.

    • I’m sure he will feel very special, having a Lego cake. The cake is easy to make and yet very unique, so he’ll be the center of attention.

  11. what a great cake! i would have never even thought of bubble wrap. looks like he enjoyed his cake!

    • The bubble wrap wasn’t my idea and love when other cake bakers pass on great ideas too. I hope you have a chance to make this cake, the kids really love it.

  12. the lego cake looks amazing. I will have to share with my sister for my nephew’s birthday

    • He’ll love picking out which lego cake piece to eat. The grandkids thought they were quite special with this cake.

  13. What a cool idea for Lego lovers! Thanks for sharing!

    • Our Lego loving grandkids thought I was very cool. They still haven’t outgrown them since a Lego store came to our area.

  14. Wow that is so creative. Great job on your cake.

    • Thanks for the kind compliment, but I’m not very creative. I just love making cakes that are special for some special grandkids.

  15. The cake is so cute and I am sure your grandson loved it! My kids are now a little old for it (and no grandkids yet) but I am tempted to make it just for the fun of it. 🙂

    • Since the kids have out grown the Lego idea, maybe there are some other themes. I hope this cake will give you some fun ideas for a cake.

  16. What a great idea! My 5 year old son absolutely loves Legos and has told me about a million times that he wants a Lego birthday party when he turns 6. Your cake turned out so cute and you had some very clever tips! Pinning this and can’t wait to show my son tomorrow!

    • I’m so glad that I’ve been helpful in fulfilling your sons birthday wish. As you can see, the cake isn’t that difficult to make. I would love to see the cake you made when his birthday happens.

  17. That is a really cool idea I would have never thought to use bubble wrap.

    • I’m can’t take credit for the idea. I found a site that used bubble wrap and it really looked like the Lego base.

Sorry, the comment form is closed at this time.

%d bloggers like this: