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St. Patrick’s Day Fun in the Blog~ Rainbow Filling Tutorial!

March 7, 2014 By Melissa D. 21 Comments

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Hi everyone! Today I’m going to share a fun and festive method for creating a striped buttercream rainbow filling for your cakes!

Instead of tinting cake batter for a colorful cake, today’s tutorial focuses on adding a little flair BETWEEN your layers. It’s a quick, easy, and fun technique to have in your decorating bag of tricks!

 

I started with three 8 inch chocolate cake layers, and about 1 cup of VANILLA BUTTERCREAM for each color.  (Looking back, 1/2 cup of each color would have worked fine..I had leftovers!) –

Here are the coloring gel colors that I used:  Americolor Super Red, Orange, Lemon Yellow, Electric Green, Sky Blue, and Regal Purple.

I filled my disposable piping bags with my tinted buttercream, and snipped off the tips.

Learn how to make rainbow cake filling in this free cake decorating tutorial by MyCakeSchool.com!

Starting with the red, I piped a circle (approx 1 inch wide) in the center of my bottom layer of cake.  I used toothpicks to mark off where my remaining colors would fall, allowing for about 1/2 inch for each color.  Adjust as needed depending on the size of your cake (mine is 8″).

Learn how to make buttercream rainbow filling in this free step by step cake tutorial by MyCakeSchool.com!

Moving right along… I encircled the red spot of frosting with orange, then yellow, green and so on.

Learn how to make rainbow cake filling in this step by step cake tutorial by MyCakeSchool.com!

Next, I placed my next layer of cake on top of our colorful bullseye pattern, and repeated once again for another colorful layer of filling.

 

Learn how to make rainbow buttercream filling in this free cake tutorial by MyCakeSchool.com!

I placed our final layer of cake on top and frosted the cake with vanilla buttercream.

 

Then, I added a few shamrocks!  Using buttercream tinted Mint Green, I piped heart shapes into a shamrock pattern using a Wilton tip 2.

Learn how to make rainbow cake filling in this free cake tutorial by MyCakeSchool.com!

 

I piped several more! (Some are a little larger, piped with a tip 5).

Learn how to make rainbow filling in this free cake tutorial by MyCakeSchool.com!

I added a few more dots of color to the outside and a small green bead border.

 

Then, slice to reveal your rainbow!

Learn to make striped buttercream rainbow filling in this free cake decorating tutorial by MyCakeSchool.com! Perfect for St. Patrick's Day!

I hope that you enjoyed this little tutorial, have a great weekend!!!

Related posts:

  1. Buttercream Ruffle Cake Tutorial
  2. Springtime Bunnies~ A Cake Tutorial
  3. The Very Hungry Caterpillar–Pull-Apart Cupcake Cake Tutorial!
  4. We’ve Picked You a Bouquet of Cupcakes! – A Blog Tutorial
  5. St. Patrick’s Day~ Buttercream Rainbow Tutorial!~

Filed Under: Blog Tutorials, Buttercream Techniques, Spring

« Fondant Ruffle Cake~ Video Tutorial
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Comments

  1. Paula M. March 7, 2014 at 8:06 pm

    Fun idea Melissa!! So clever and eye catching.

    Reply
  2. Sally Loda March 7, 2014 at 11:05 pm

    Wish I had seen this yesterday! ;-) I would have loved to do it for my cake.

    Reply
  3. abha March 8, 2014 at 7:42 am

    Thanks a lot. I really loved it

    Reply
  4. MsGF March 8, 2014 at 9:14 am

    Love it! Very clever.

    Reply
  5. Carol March 8, 2014 at 10:44 am

    I like it! And gives a new meaning to taste the rainbow. LOL

    Reply
  6. Joy March 9, 2014 at 12:00 pm

    Love this tutorial. It’s so festive and cute!! Thank you for all of your great work!

    Reply
  7. Melissa Diamond March 10, 2014 at 8:44 pm

    Thank you for your comments!!

    Reply
  8. scott March 11, 2014 at 12:21 pm

    Oh great! I now know what to bake For St. Patrick’s Day !

    I have been so busy : ) I have missed all of you.

    Scott

    Reply
  9. Mary March 12, 2014 at 10:05 am

    That is so cool! You have such creative ideas!

    Reply
  10. Dina March 14, 2014 at 12:38 pm

    Awesome Idea, I will have to do this for St patty’s day :)

    Reply
  11. mandy March 15, 2014 at 9:59 pm

    Looks awesome

    Reply
  12. trisha March 21, 2014 at 6:36 pm

    I am just KICKING myself for missing this for Sophia’s bday (she was born on 3/17) Aggggggghhhh!! This is awesome! Love catching up here today…..smiles everywhere along w/ good inspiration.

    Reply
  13. Melissa Diamond March 21, 2014 at 10:25 pm

    Thanks for all of your comments!! @Scott~ We’ve missed you too! ;0) –

    @Trisha~ So happy to see you here, how much fun that Sophia’s b-day is St. Patrick’s Day ;0) – You will have to plan a rainbow sneak attack for her in your next cake, just for the fun of it! xoxo

    Reply
  14. María José A.G. April 7, 2014 at 3:28 pm

    sencillamente deliciosa, además colorida como a mi me gustan.
    besos

    Reply
  15. komal August 19, 2014 at 3:00 pm

    Very beautiful
    It seems hard but ur tutorials make it so easy
    I will try it
    tomorrow
    My son’s b day

    Reply
  16. Ansa Hogan February 24, 2015 at 8:41 pm

    LOVE this cute idea!

    Reply
  17. Melissa Diamond February 24, 2015 at 10:23 pm

    Thanks Ansa!! xo

    Reply
  18. Adeoye K. Uwa March 10, 2017 at 10:21 pm

    Wawoo i love this. Thanks am going try it in my next work. Am glad to be here.

    Reply
  19. Melissa Diamond March 10, 2017 at 11:49 pm

    Thanks Aedoye! So glad that you plan to try it!

    Reply
  20. Crystal August 11, 2018 at 2:08 pm

    I love the look of this. How will the rainbow icing colors look inside of a marble cake

    Reply
  21. Melissa Diamond August 11, 2018 at 6:31 pm

    Hi Crystal, I think it would look cute!

    Reply

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