Lego Cake


Tomorrow is my last day working at the Lego store this summer, so I decided to make a Lego brick shaped cake for the occasion. I made a vanilla cake with a white chocolate buttercream icing so I could food colour it pretty easily. I made a 9"X13" cake and cut it in half to make the brick, and then used marshmallows to make the top of the brick. There are certainly some things I would do differently next time, but it came out alright.




  • 1 tbsp. apple cider vinegar
  • 1 cup milk
  • 1-¾ cups flour
  • 1 cup sugar
  • 1 tsp. baking powder
  • 1 tsp. baking soda
  • ½ tsp. salt
  • 3/8 cup oil
  • 2 tbsp. apple sauce
  • 2 tbsp. vanilla


  1. Preheat oven to 350F.
  2. Add vinegar to milk, and set aside.
  3. Whisk together flour, sugar, baking powder, baking soda, and salt
  4. Mix milk, oil, apple sauce, and vanilla together
  5. Combine wet and dry ingredients. Don’t overmix
  6. Bake for about 20 minutes, rotating pan halfway through*

*Admittedly, I forgot to actually time how long this took. It does bake more quickly than the average cake though. 


  • 1 cup softened butter
  • 140g white chocolate
  • 2 tsp. vanilla
  • pinch of salt
  • 2.5 – 3 cups icing sugar


  1. Whip butter at medium speed until creamy.
  2. Melt chocolate and add to butter. Chocolate can be melted on the stove over a pot of water, or in the microwave in short intervals.
  3. Add vanilla, almond extract, and salt to butter mixture. Add icing sugar, and mix well.

**This makes much more icing than necessary. I made enough for this cake and a batch of cupcakes. 


After baking the cake, I did a crumb coat and put the cake in the freezer for ~20 minutes, and then did a real coat. I have started using a bench scraper to get the sides even, and it is magical! This was my first time doing a rectangular cake like this, and it’s not amazing, but not terrible either.


After icing it, I cut some marshmallows in half and stuck them on top. I froze them into place before trying to ice them. 


If I were to make a cake like this again, I would melt the icing a bit and dip the marshmallows in. I could NOT get them iced nicely by using a spatula. 


A different sort of Lego cake! 

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s