Extra Rich Vanilla Cake with Rainbow Frosting

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No special tools or skills necessary! Extra Rich Vanilla Cake Recipe with Rainbow Frosting

Extra Rich Vanilla Cake Recipe with Rainbow Frosting

By now it’s no secret that I kind of have a thing for rainbows. Whether it’s a swirly rainbow cheesecake, a tie-died rainbow birthday cake, or rainbow chocolate chip cookies, I just can’t quit rainbows. I have even been known to snack on homemade rainbow granola.



Extra Rich Vanilla Cake Recipe with Rainbow Frosting

I love partnering with brands that I use and trust in my own home. So when McCormick asked if I would like to help celebrate their 125th birthday (!!!) I knew that I wanted to make them a unique rainbow cake. Let’s be real here. They sent me their special anniversary edition Extra Rich Pure Vanilla Extract then I made a cake. Then I ate the cake all by myself. I didn’t even save them a piece. I am the worst friend.

No special tools or skills necessary! Extra Rich Vanilla Cake Recipe with Rainbow Frosting

I purposely used a boxed vanilla cake mix for this recipe so as not to scare anyone off. If boxed cake mix is against your religion you can make your favorite recipe from scratch. Just be sure to add in some extra rich vanilla extract- you only turn 125 once, right?!  Please note that you will need two boxes of cake mix for 3 thick cake rounds. You could spread 1 box between 3 rounds but there is a lot of frosting tucked inside this cake so I wanted the frosting-to-cake ratio to be just right. (You will have an extra cake round- I let my kids decorate that one while I worked on the rainbow cake.)

When it comes to the frosting you can use your favorite as well. Tint 1/2 cup of frosting red, orange, yellow, green, blue, and purple. Then spread the frosting in a bulls eye pattern between your cake layers.

Extra Rich Vanilla Cake Recipe with Rainbow Frosting- simple tutorial and recipe

Extra Rich Vanilla Cake with Rainbow Frosting


Yield: 1 3-layered cake

Prep Time:1 hour

Cook Time:30 - 35 minutes

Total Time:90 minutes

No special tools or skills necessary! Cut inside your cake to reveal a secret rainbow frosting.


2 boxes white cake mix
McCormick Extra Rich Pure Vanilla
McCormick food color
6 Cups white buttercream frosting


  1. In a large bowl or mixer fitted with the paddle attachment, mix cake according to package directions. When adding eggs add in 1 Tablespoon pure vanilla extract.
  2. Bake cakes and cool according to package directions.
  3. Tint 1/2 cup of frosting each red, orange, yellow, green, blue, and purple. Then spread the frosting in a bulls eye pattern between your cake layers.
  4. Stack cakes and frost with a thin crumb coat of white buttercream. Chill for 1-2 hours then finish with a thick layer of white buttercream.


Original recipe and images © In Katrina's Kitchen 

Happy birthday, McCormick! I hope your birthday is SWEET!

Extra Rich Vanilla Cake Recipe with Rainbow Frosting- this impressive cake is easy to make!

Items used in this recipe:


In Katrina’s Kitchen is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.

I am honored to be a part of the McCormick Everyday Bakers program. This recipe was sponsored by McCormick. I was compensated for my time; all opinions are my own.

- Katrina

27 Responses to “Extra Rich Vanilla Cake with Rainbow Frosting”

  1. #
    Rachel @ Baked by Rachel — September 29, 2014 at 10:54 am

    What birthday girl or boy wouldn’t love a slice of this cake?! So festive!!

  2. #
    Karly — September 29, 2014 at 11:20 am

    What a fun way to jazz up cake mix!! Love this, Katrina! I need to get my hands on that vanilla.

  3. #
    Jess @ whatjessicabakednext — September 29, 2014 at 11:21 am

    This cake is absolutely stunning! Love rainbow frosting!

  4. #
    Carolyn — September 29, 2014 at 11:25 am

    That is adorable! Happy birthday to McCormick!

  5. #
    Cookin+Canuck — September 29, 2014 at 11:47 am

    This is such a fun idea, Katrina! It would definitely be a hit at any birthday party.

  6. #
    Kristen — September 29, 2014 at 11:58 am

    That is such a pretty cake, Katrina! Love the festive colors 🙂

  7. #
    alice — September 29, 2014 at 12:06 pm

    Love this version of doing a rainbow cake! Very clever!

  8. #
    Danielle @ Truffles n' Treadmills — September 29, 2014 at 1:18 pm

    I love the way you did the icing between the layers! I will have to remember that! Side note- I have those same paper straws! 🙂

  9. #
    Liz — September 29, 2014 at 2:56 pm

    Wow! That rainbow filling is a work of art!!! What a gorgeous surprise in this yummy cake!

  10. #
    Kayle (The Cooking Actress) — September 29, 2014 at 7:07 pm

    This cake is so cheerful and pretty! Not to mention tastyyyy!

  11. #
    Akaleistar — September 29, 2014 at 10:14 pm

    That cake looks like it knows how to party!

  12. #
    Cassie — September 30, 2014 at 8:38 am

    What a fun way to celebrate a birthday! Too cute, Katrina!!

  13. #
    Jenny Flake — September 30, 2014 at 8:57 am

    Sooooo much fun!! Cutest cake, looooving the frosting! xo

  14. #
    Jessica @ A Kitchen Addiction — September 30, 2014 at 10:04 am

    Such a fun cake! What a great way to celebrate a birthday!

  15. #
    Amanda — September 30, 2014 at 8:43 pm

    I love everything about this! So much fun!!

  16. #
    Deborah — October 1, 2014 at 9:56 am

    This is seriously so cool!! I think I’ll be making myself a belated birthday cake!

  17. #
    Cathy Pollak ~ Noble Pig — October 1, 2014 at 11:39 am

    What a sweet Birthday cake! I bet kids would go crazy for it!

  18. #
    Jennie @themessybakerblog — October 2, 2014 at 9:31 am

    Best. Birthday. Ever! Who wouldn’t love a bright rainbow-swirl cake? Love!

  19. #
    Lori @ RecipeGirl — October 2, 2014 at 11:51 am

    What a fun dessert! I am going to be on the lookout for that extra rich vanilla!

  20. #
    Faith (An Edible Mosaic) — October 3, 2014 at 9:45 am

    This is absolutely adorable! I’d be the happiest birthday girl ever celebrating with this beautiful cake. 🙂

  21. #
    Joanne — October 3, 2014 at 5:48 pm

    Rainbow infusions just make all foods taste better…even cakes that are already ultra delicious! This is a masterpiece.

  22. #
    Erin @ Making Memories — October 21, 2014 at 9:13 am

    This is totally adorable! LOVE IT!

  23. #
    ATasteOfMadness — October 28, 2014 at 10:49 pm

    This cake is so fun! I need to make a super colorful cake sometime. I love this!

  24. #
    Toni Torres — January 20, 2015 at 5:04 pm

    I’m making a cake like this on Friday for my daughters Art Party..what size cake pans did you use for this with the 3 boxes of cake mix. 9″?

  25. #
    Xombie Rainbow — June 18, 2015 at 7:15 pm

    A very different take on the sweet sticky rainbow cake!

  26. #
    CakenGifts.in — June 22, 2017 at 7:34 am

    You have great write up, I always read your blog. and I must say you are doing good job, plz do write like this.

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