The Best Rainbow Cake Ideas for Birthday Parties
Whether you’re planning your own birthday or a party for someone else, one of the most important decisions you’ll have to make is about the cake. Do you want something dramatic and over-the-top or something fun, clean, and simple? Do you want a shaped cake or stacked round layers? And while there are undoubtedly seemingly endless birthday cake ideas, with options for color scheme and flavor, there’s just something about a rainbow cake that screams “birthday!”
If you’re looking for rainbow cake ideas for birthdays, you’ve come to the right place. These fun, vibrant yet artistic cakes will be the perfect centerpiece at any birthday party or special event. Plus, each cake offers a unique twist on a classic boxed rainbow cake (you know the one), elevating these cakes into stunning showpieces. No matter which of these rainbow cakes you pick, the small crowds of guests at your events are sure to love them!
1. Special Message Cake
The Special Message Cake lets you customize and personalize your rainbow cake to celebrate a birthday or any other special occasion. This fun, nostalgic round cake is decorated with brightly colored sprinkles mixed right into the buttercream. The top of the cake is the real show-stopper, however. Select the message you’d like printed on the edible paper cake topper for a personal touch (don't worry, the ink is edible too!). Perfect for kids and adults alike, everyone will love this whimsical twist on a classic sprinkle cake.
Why You’ll Love the Special Message Cake
Customizable with a personal message
The bright, pretty sprinkles add fun, but still look elegant
The ideal rainbow cake for kids and adults alike
Make the flavor funfetti, and then it will be the full rainbow sprinkle package!
2. The Rainbow Cake
This cute Rainbow Cake is a bold, colorful showstopper. The beautiful cake is fun and festive, a striped, brilliantly-colored rainbow layer cake that's topped off with piped buttercream rosettes and plenty of nostalgic sprinkles. Choose from either the classic rainbow colors or a light, fairytale pastel color scheme. Perfect for kids or for adults looking for a joyful birthday cake. This cake features vivid, multi-colored layers stacked to create a visual feast for the eyes.
Why You’ll Love the Rainbow Cake
Bold, eye-catching rainbow layers (though there's also an option for a pastel rainbow cake)
Topped with multi-colored buttercream rosettes (the colors of the rainbow, of course) and lots of sprinkles
A show-stopping centerpiece for your birthday celebration that's perfect for anyone who loves a whimsical rainbow-colored cake.
3. Shagadelic Baby Cake
If you’re looking for a less-expected rainbow birthday cake, you have to check out our Shagadelic Baby Cake. An excellent choice for anyone who loves a little retro inspiration, this ‘70s-style cake is a textural dream, featuring shaggy frosting in a kaleidoscope of colors. With rich, vibrant colors and a fun, creative design, this is a cake that doesn’t take itself too seriously—perfect for anyone looking to inject a little bit of funk into their memorable birthday party.
Why You’ll Love the Shagadelic Baby Cake
Deeply pigmented with tons of texture, the best part about this cake is the way it brings the retro flair
This rainbow cake makes a stunning conversation starter at any birthday party or special event
Perfect for someone on the hunt for a cute cake that’s a bit out of the ordinary
4. Sprinkle Party Cake
From the top of the cake, the Sprinkle Party Cake looks like a nostalgic, classic birthday cake with pastel buttercream and a smattering of rainbow sprinkles, but this gorgeous yet unassuming cake shows off its dramatic side with tons of colorful sprinkles along the lower half of the cake. It’s fun, festive, and tailor-made for birthdays.
Why You’ll Love the Sprinkle Party Cake
This fun rainbow cake screams fun with its layer of colorful sprinkles
The creaminess of the buttercream with the crunch from the sprinkles strikes the perfect textural balance
It's a great choice for birthday parties and celebrations of all kinds
Choose your base color to customize it for the guest of honor!
How to Pick the Perfect Rainbow Cake for Birthdays
What’s the Theme? When you're picking a cake for a themed birthday party, you want to consider how it'll fit the party. For a chicer and more sophisticated birthday party, the Rainbow Cake or the Special Message Cake might be the direction you want to go in. If you’re planning an event that’s big on fun, the Shagadelic Baby Cake or Sprinkle Party Cake will make a statement and catch your guests’ attention.
Send a Message: If you want to personalize the cake, opt for the Special Message Cake or pick the color palette that best suits the guest of honor with the Rainbow Cake or the Sprinkle Party Cake.
Pair the Cake with the Event: The best rainbow cakes for birthdays fit with the overall aesthetic of the party you’re throwing. Consider if the party you’ve planned is more dreamy and pastel or bold and bright and then choose your cake accordingly. Beautiful rainbows go with any event, right?
Choose your add ons! While checking out, choose to jazz up your cake with gold candles, edible glitter, or disco balls to really wow your guests!
These rainbow cake ideas for birthdays are both beautiful and delicious, making the party you’re throwing one to remember. Whether you’re looking for a cute and casual sprinkle-covered cake or a chic showstopper, there’s a rainbow cake that’ll perfectly match your party (and personality)—even if the theme is really just "rainbow party."
Looking for even more ideas? Our curated collection of custom cakes includes creative designs for a ton of different occasions ranging from anniversaries to birthdays, weddings, or anything you're hoping to celebrate. What's a better way to celebrate than with a beautiful cake?
