Coolest Lego Birthday Cake

I created this Lego Birthday Cake for my son’s 8th birthday party.

I used 3 box mixes to create 4 8×8 square, 1 10″ round and one 6″ round cakes. These were made 3 days in advance of the party.

The cakes were cut to size to ensure smooth edges and flat surfaces. Two of the 8×8 cakes were doubled up to make the 4 peg brick. The two peg and single peg bricks were made using the other 2 8×8 cakes. After doubling up the cakes, I cut the cake in half and then cut one of the halves in half again.

Two days before the party I iced the individual bricks with buttercream icing. This was a skim coat to prep the cakes for the fondant. The cakes were stored in the refrigerator after the crumb coat was applied. I also colored the fondant 2 days before the party to let the color set up. Using Wilton White Fondant (2 5# boxes – I could have probably got away with just one as I had a lot left over)and gel coloring I preped the fondant. Wrap it tightly in plastic wrap and store at room temp.

One day before the party I covered each of the cakes with the appropriate fondant color. The pegs were created by rolling the fondant out to 3/4″ thick and then cutting with a 1.5″ circle cutter. I used buttercream icing colored in the appropriate shade and a piping bag to write LEGO on each peg. The pegs were placed on each of the bricks. We covered a large cardboard with green paper and then spaced the remaining pegs equally to create the base plate.

I did a practice cake the weekend before as this was my first time using fondant – I was a bit intimidated by all I had researched. It really was not that bad. There are a few good videos on YouTube on how to cover a square cake with fondant that were very helpful!

The cake was a HUGE hit with my son’s friends.

5 thoughts on “Coolest Lego Birthday Cake”

  1. This is by far my favorite cake. You did an amazing job and I think it is the most realistic looking. I may even just bite the bullet myself and try to use fondant.


  2. Yes, this cake is great. I was asked to make a Lego cake and I found this one to use as an example. I hope mine turns out just as good.

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