May 12, 2013

Lego Cake {Peanut Butter Cake}

Lego Cakes.

They seem like they’d be so simple, yet they can go wrong, so quickly.  Just do a little google search, you’ll see what I mean.

So when I was asked to make a Lego cake for an 8-year old’s birthday, I was nervous!

Lego’s are so iconic – I didn’t want to mess it up!

The solution came in the form of a silicone candy mold!  I kept the cake itself simple and clean and then decorated it with candy Legos!  It was the perfect solution for a little boy’s Lego cake!

Peanut Butter Cake
An Amy’s Confectionery Adventures Original Recipe

1 box yellow cake mix
3 eggs
1 cup all purpose flour
¾ cup sugar
1 tsp baking powder
1 cup water
½ cup smooth peanut butter
½ cup canola oil

Preheat oven to 325 degrees.  Spray two 9-inch pans with nonstick spray (or prepare muffin tins with cupcake liners)

Place all ingredients in the bowl of a stand mixer.  Blend on low until ingredients are combined, about one minute.  Scrape the sides of the bowl and beat on medium for 2 minutes.  Pour batter into the prepared pans.

Bake at 325 for 30-35 minutes (18-22 minutes for cupcakes).  If needed, continue baking at 5 minutes increments until a toothpick inserted into the center of the cake comes out clean.

Cool the cakes on wire racks in the pans for 10 minutes.  Then run a knife along the edges of the pan and invert.  Cool the cakes completely.  

Once cooled, frost with Dairy Free Chocolate Frosting (below) or your favorite chocolate frosting. 

To make the Lego bricks, pour colored candy melts into a silicone Lego mold.  Once hardened, pop the chocolate Legos out and make a Lego border.

Makes 1 9-inch cake or 28 cupcakes

Dairy Free Chocolate Frosting

1 cup vegetable shortening
6 cups powdered sugar
1 1/3 cups cocoa powder, sifted
2/3 cup vanilla soy milk

Place the ingredients in the bowl of a stand mixer.  Mix on low until combined.  Increase speed to medium-low and beat until smooth and fluffy.  Add more soy milk as needed to thin for decorating.


  1. This cake looks soooo rich and delicious (not to mention ADORABLE!)

  2. Looks awesome! Thanks for linking up to Marvelous Mondays at Call Me PMc ~Paula

  3. This is probably my favorite lego cake that I have seen!

  4. Sooo Awesome! I would love this as my birthday cake now and I am 28 years old! Great job Amy :)

    Happy Blogging!
    Happy Valley Chow

  5. This is just beautiful! It looks and sounds delicious, too!

  6. WOW!! This is amazing! I hope you link to my party.
    A new party will be posted tomorrow too in case you can't link today.
    You are so talented!!

  7. What a fun cake! It looks great!

  8. Wow! I am so impressed with this cake! And it sounds and looks delicious. :)

    We'd love for you to share this over at Much Ado About Monday, if you get a chance. :)


  9. Wow! Looks amazing, how fun!

  10. This is so stinkin' cute. Great job!

  11. Super cool cake! My guys would love it! I am visiting from the party at From Dream To Reality!


  12. It looks fantastic! Well done.

  13. This is SO cute!!!

    I would love for you to share and link up at my TGIF Link Party.

    Hugs, Cathy

  14. How cute is this cake?! I love it. Thank you so much for coming by and linking up to the Pinworthy Projects Party!

  15. fun and so cute this cake! love the colors too! so cute! :-) glad to have stopped by from yourhomebasedmom linky party today! Ingrid

  16. This is super cute, Amy! Thanks so much for sharing at Marvelous Mondays. You will be featured at tonight's party. Hope to see you there!

    Julie @ This Gal Cooks

  17. what a fun cake and looks so adorable.

  18. Wow! Amazing! My son would love a cake like this. Saw your link over at All She Cooks and had to drop by to pin it! Hope you'll stop by I Dig Pinterest soon!

    Christine @

  19. SO cute... how fun! Thank you so much for coming to share at Super Saturday Show & Tell! I'd love to have you come and share again today Have a great weekend! xoxo~ Ruthie

  20. How far in advance can you make the Lego with the candy melts? I am going to try to make something along this line for my sons' birthdays but we have a power packed weekend with swim team the day before their party so I am trying to get as much done ahead of time as I can. Thanks!

  21. You can make them pretty far in advance! I started about a week and a half before I made the cake (I only had one Lego mold and let them dry overnight each time I poured a batch), but you could start even earlier, if you'd like!


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