This chocolate rainbow sprinkle cake is delicious and super fun to make and share with friends and family too. Between each layer of chocolatey goodness, you’ll find a colorful layer of frosting. Plus, there are lots of sweet sprinkles all around the outside too.
Do you love chocolate, cake, and sprinkles? Of course, you do! That’s why I’m so excited to share this new recipe. It’s perfect for special occasions and sure to be a big hit with everyone.

Chocolate Rainbow Sprinkle Cake
This chocolate cake with sprinkles on top is perfect for a birthday celebration because it’s covered in cheerful rainbow colors inside and out.
Keep reading to get the recipe for your very own chocolate sprinkle cake dessert and lots of fun ideas for a rainbow-themed celebration too.
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Chocolate Sprinkle Cake Ingredients
Ready to make your very own chocolate sprinkle cake? This delicious chocolate cake has rainbow frosting between the layers. Plus, it’s topped with delicious fudgy icing and rainbow sprinkles too. Here’s what you’ll need to make one of your own:
- 2 Boxes chocolate fudge cake mix
- 6 large eggs
- 2 ½ C Whole Milk
- 1 C unsalted sweet cream, softened
Vanilla Frosting ingredients
- 2 C unsalted sweet cream butter, softened
- 6 C powdered sugar
- 3 tbsp pure vanilla extract
- 6 tbsp heavy whipping cream
- Purple gel food coloring
- Sky Blue gel food coloring
- 2 10.5 oz Rainbow Jimmie Sprinkles
I think Jimmies are the best kind of sprinkles. They’re so tasty! I found my rainbow Jimmie sprinkles at Walmart on the baking and cake decorating aisle.
Additionally, to make this recipe easier you can use 2 jars of your favorite store-bought vanilla icing too. Using store-bought icing makes building this chocolate sprinkle cake even easier.

How To Make Your Own Chocolate Cake With Sprinkles On Top
Once you’ve gathered all the ingredients, you can follow these simple steps to create your very own chocolate cake with sprinkles on top and rainbow frosting layers:
Let’s get started…
Preheat oven to 350 degrees and spray the cake pans with pam baking spray.
Using a large bowl, beat the cake mix, butter, eggs, and milk until combined and smooth and evenly divide the cake batter between the 3 pans.
Place into the oven and bake for 22-26 minutes or until a toothpick comes out clean.

Allow cooling completely before covering with foil and setting them aside to use the next day. By doing this, it will allow you to get a clean cut slice of cake

Frosting Directions
If you are using store-bought icing – divide the vanilla icing into 3 bowls and add the coloring described below.
Making Homemade icing: Using a standing mixer, beat the butter, powdered sugar, vanilla, and heavy whipping cream together until combined, smooth and stiff with peaks.
Once the frosting is made, divide the 1 ½ cups of frosting into 2 small bowls, leaving the rest in the mixing bowl for the outer layer of the cake.
In one bowl, mix in 4 drops of purple gel food coloring
In the second bowl, mix in 4 drops of blue gel food coloring

Building the cake
Remove the cakes from the pans and onto the cake boards or a cake plate.
Using a cake slicer, slice off the tops of the cakes to create a flat cake layer

Using one of the cake layers as the bottom layer, scoop the purple frosting onto the cake layer and spread it evenly
Place a second cake layer on top
Scoop the blue frosting on top of the cake layer and spread evenly
Place the third cake layer on top of the frosting
Smooth the two frostings on the outside to create a smooth layer on the outside
Using the white frosting, completely coat the cake in the white frosting and smooth evenly

Place the cake onto a cookie sheet
Using the sprinkles, completely coat the cake in the sprinkles
Once coated, place them in the fridge for a few hours to allow them to harden
Chocolate Sprinkle Birthday Cake

This yummy chocolate rainbow sprinkle cake is perfect for all kinds of special occasions. It makes a really cute birthday cake for kids too. Keep reading for some fun rainbow birthday ideas where your chocolate sprinkle cake can shine.

Celebrate With A Chocolate Sprinkle Birthday Cake
My daughter loves rainbows and chocolate, so this sweet and colorful cake was just perfect for her birthday celebration! We added a few more rainbow decorations and rainbow-themed foods for a colorful party theme everyone loved.
Check out some of our ideas:
Chocolate Rainbow Sprinkle Cake Toppers
There are all kinds of fun ideas for birthday cake toppers! Here are some of my favorites:
- Colorful Rainbow Cake Topper
- Birthday Rainbow Candle
- Unicorn Figure Cake Topper
- Rainbow Dinosaur Cake Toppers
Colorful Decorations For Your Celebration
No matter the theme, balloons are always a great way to add some color and lots of fun to your celebrations. Choose balloons in a variety of colors to make your own rainbow theme. Add colorful streamers for even more decoration fun.
Check out rainbow cloud foil balloons or multicolor confetti balloons for extra decorating fun.

More Rainbow Party Food Ideas
In addition to this yummy chocolate rainbow sprinkle cake, you can enjoy all kinds of tasty rainbow foods at your celebration. Try some of these favorites:
Looking for a healthier rainbow food option to offer your guests? Try fruit kabobs, a homemade fruit salad, or a rainbow veggie platter.
Whatever you decide to serve with it, this chocolate rainbow sprinkle cake makes a beautiful centerpiece and it’s sure to be the star of the show!

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Chocolate Rainbow Sprinkle Cake Recipe

Chocolate Rainbow Sprinkle Cake Recipe
Ingredients
- 2 Boxes chocolate fudge cake mix
- 6 large eggs
- 2 ½ C Whole Milk
- 1 C unsalted sweet cream softened
- 3 9 in round cake pans
Vanilla Frosting ingredients
- 2 C unsalted sweet cream butter softened
- 6 C powdered sugar
- 3 tbsp pure vanilla extract
- 6 tbsp heavy whipping cream
- Purple gel food coloring
- Sky Blue gel food coloring
- 2 10.5 oz Rainbow Jimmie Sprinkles
- 2 Jars of Vanilla Icing Optional
Instructions
- Preheat oven to 350 degrees and spray the cake pans with pam baking spray
- Using a large bowl, beat the cake mix, butter, eggs, and milk until combined and smooth
- Evenly divide the cake batter between the 3 pans
- Place them into the oven and bake for 22-26 minutes or until a toothpick comes out clean
- Allow cooling completely before covering with foil and setting them aside to use the next day. By doing this, it will allow you to get a clean cut slice of cake
Frosting Directions
- Using a standing mixer, beat the butter, powdered sugar, vanilla, and heavy whipping cream together until combined, smooth and stiff with peaks
- Once the frosting is made, divide the 1 ½ C of frosting into 2 small bowls, leaving the rest in the mixing bowl for the outer layer of the cake
- In one bowl, mix in 4 drops of purple gel food coloring
- In the second bowl, mix in 4 drops of blue gel food coloring
Building the cake
- Remove the cakes from the pans and onto the cake boards
- Using a cake slicer, slice off the tops of the cakes to create a flat cake layer
- Using one of the cake layers as the bottom layer, scoop the purple frosting onto the cake layer and spread it evenly
- Place a second cake layer on top
- Scoop the blue frosting on top of the cake layer and spread evenly
- Place the third cake layer on top of the frosting
- Smooth the two frostings on the outside to create a smooth layer on the outside
- Using the white frosting, completely coat the cake in the white frosting and smooth evenly
- Place the cake onto a cookie sheet
- Using the sprinkles, completely coat the cake in the sprinkles
- Once coated, place them in the fridge for a few hours to allow them to harden
[…] Chocolate Rainbow Sprinkle Cake Recipe […]