This colorful Lego cake is guaranteed to bring joy to any occasion! It's incredibly easy to make and is sure to be a showstopper.
Absolutely uncomplicated, but a real eye-catcher: this colorful building block cake will result in a good mood!
Taste and Occasion
The best thing is that Lego cake makes not only girls and boys happy. Because the preparation is also super uncomplicated, even the older bakers are happy 🙂 . Perfect for children's birthday parties, cake bazaars, or parties!
Ingredients
My recipe is for a Lego cake without fondant. Thus, it is also wonderfully suitable for beginners and all those who, like me, can do without motif cakes and Co. well 😉 . The easy building block cake is a mixture of other baking recipes such as my lemon cake. The highlight: I prepared the batter for the Lego sheet cake with apple juice instead of milk and brushed it with it after baking. Wonderfully moist and fruity! The result is, of course, eye-catching because of the decoration: a colorful icing with matching chocolate lentils.
Oh well, clearly, a Lego cake is not diet food. But great masses of sugar (650g!) and butter (440g), as used in other recipes from major portals, are absolutely unnecessary. Or how do you think about this?
How to make the Lego Cake
Prep the Pan: Grease a baking sheet (at least 16 x 14.5 inches / 42 x 37 cm) and dust with flour or line with parchment paper. Preheat your oven to 350°F/175°C.
Make the Batter: Beat the softened butter and sugar together for several minutes until creamy and light. Gradually beat in the room-temperature eggs, one at a time, until fully incorporated.
Mix Dry Ingredients: In a separate bowl, combine the flour, cornstarch, baking powder, salt, and lemon zest. Gradually add this mixture to the egg and butter mixture, alternating with the apple juice (but don’t overmix). The batter should be thick enough that it doesn’t easily drop from the spoon; add a bit more liquid if needed.
Bake the Cake: Spread the batter evenly onto the prepared baking sheet and smooth the top. Bake for about 20 minutes. Check for doneness with a toothpick—the cake should stay light in color and not overbake, so it remains moist.
Cool and Slice: Lightly brush the cake with a bit of apple juice and let it cool completely. Once cooled, cut the cake into 4-6 strips, depending on how many colors you want.
Make the Frosting: Sift the powdered sugar into a bowl and mix with enough juice and milk to create a thick, yet spreadable frosting. Divide the frosting into 4-6 portions and color each portion with natural food coloring. Start with a small amount (e.g., ¼ teaspoon) of sifted color powder and add more until the desired shade is achieved.
Decorate: Using a small cake spatula, pastry scraper, or spoon, spread the frosting evenly over the cake strips. Then cut the strips into oblong or square pieces, and top each piece with chocolate lentils to mimic Lego bricks.
Top Tip
You don’t need artificial food coloring loaded with chemicals to create this vibrant Lego cake. Natural food powders from fruits and vegetables, as well as gel or paste colors (make sure they're fat-soluble if using with white chocolate), work beautifully.
Recipe Card
Lego Cake
Equipment
- 1 Baking Sheet
Ingredients
For the dough
- 250 grams (1 cup) butter, soft
- 180 grams (1 cup) sugar
- 6 eggs, medium
- 300 grams (2 ½ cups) all-purpose flour
- 130 grams (1 cups) cornstarch
- 1 small bag baking powder
- 1 pinch salt
- 1 teaspoon grated lemon zest, quantity to taste
- 150 milliliters (10 tablespoons) apple juice, or milk
For the decoration
- 3 tablespoons apple juice, for coating/soaking
- 250 grams (2 cups) powdered sugar
- 3 tablespoons milk, very coarse
- 3 tablespoons apple juice, or lemon juice
- 200 grams (1 cups) colored chocolate lentils
- 4 teaspoons natural food coloring
Instructions
- Grease a baking sheet (at least 1614,5 in / 4237 cm) and dust with flour or cover with baking paper. Preheat to 350°F/175°C.
- Beat the softened butter and sugar for a few minutes until creamy or light and fluffy. Gradually beat in the room-warm eggs until well blended.
- Mix flour, cornstarch, baking powder, salt, and lemon zest. Stir into the egg cream alternately with the apple juice (but not too long). The dough should be hard to tear from the spoon; otherwise, use more liquid if necessary.
- Spread dough evenly on a baking sheet and smooth out. Bake for about 20 minutes. Test with chopsticks. The cake should remain light in color and not stay in the oven too long to avoid dryness.
- Brush the cake very thinly with some juice and let cool completely. Then cut into 4-6 strips (depending on the number of colors you want).
- For frosting, sift powdered sugar and mix with enough juice and milk to make a thick but still spreadable frosting. Divide frosting into 4-6 portions. Thoroughly stir a small amount (e.g., ¼ teaspoon) of sifted coloring powder into each frosting portion first. Add more powder as desired until desired shade is achieved.
- Using a small cake palette, pastry scraper, or spoon, spread divided dough evenly thinly with one color, cut into oblong or square pieces with a large sharp knife, and top Lego-style with chocolate lentils.
Notes
Ingredient substitutions
Variations
If you want to make kids happy, bake the Lego sheet cake very soon! And use the colors right away for the rainbow cheesecake, or healthy donuts 🙂 . Of course, I have many more delicious sheet cakes and baking recipes for kids!
About Kathrin & Jan
It's like a little miracle to me every time. Seemingly simple ingredients are made into something that can brighten up your life. Butter, sugar, eggs, and flour melt into an airy biscuit, a fine tart, a juicy cake, or a crispy biscuit. Baking simply makes you happy. Welcome and enjoy our blog!
Kathrin & Jan
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