Peanut Butter Cake (LEGO Cake)

This post first appeared on my other blog in 2013, but since I no longer maintain that one, I'm reposting some of my favorites here!

For this month’s Movies and Munchies, we watch Paul Blart: Mall Cop.  It is a goofy comedy that we watched with my boys.  We were laughing out loud several times!

I’m coming in under the wire here, so I took a little creative liberty in my post.

I was inspired by the Black Friday theme and a peanut butter scene (Paul slathers peanut butter on what looks to be a cherry pie), then I decided to use my resources and go with a repost.

As you can gather from the disclaimer above, I used to host 2 blogs, one entirely dedicated to cake decorating, but when I reentered the work force, it became too much to run 2 blogs.  I was posted exclusively on Insta for a while and now I am reposting my favorites over here, because I’m proud of my work!

This one was so fun to make, since I have LEGO lovers in my house too (and they are definitely a Black Friday hit each year!  Plus, peanut butter cake, because why not?  It’s delicious!

Original post:

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. I LOVE that Lego cake and glad you got a chance to share it again!!

  2. Thanks for joining in, Amy. I, too, am reposting from a defunct blog because I love some of those recipes. We love the combo of peanut butter and chocolate. I can't wait to try this.

  3. What a great inspired-by dish. That cake is lovely and so professional looking. Loved the peanut butter tie-in.


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