This rainbow swirl cake is easier to make than you may think! Dress up a boxed cake mix.

Rainbow Cake Recipe and Tutorial


My baby boy turned 2 this week. He lives his life with such joy and you just can’t be near him without laughing. And he’s wild. He deserved a Rainbow Swirl Cake.

I love how he sings his ABCs at the top of his lungs.

I love how he says “Hi! How you doin’?” to every single person he makes eye contact with.

I love how he does somersaults when he is excited,

and tells people to clap whenever he completes a puzzle.

While I could do without him climbing on top of our kitchen table

I love when he gives me that ornery little grin when he’s been caught.

Rainbow Cake Recipe and Tutorial

I love his wet, sticky kisses

and his ticklish little baby toes.

I love how he watches Yo Gabba Gabba even while staying in constant motion

and how he can fall asleep upright in his rocking chair reading a book.

I just love him to pieces. ♥

Rainbow Cake Recipe and Tutorial

Making a rainbow swirl cake is very easy- I hope you’ll try it sometime. I snapped a few pictures with my phone along the way.  Oh yes- he liked the cake 😉

Rainbow Swirl Cake from @KatrinasKitchen

Rainbow Swirl Cake from @KatrinasKitchen

Rainbow Swirl Cake

This rainbow swirl cake is easier to make than you may think!

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  • Yellow, or white cake batter, divided
  • Gel food dye, I use Americolor
  • Buttercream frosting


  • Prepare your cake batter as you normally would and divide into however many sections that you would like.
  • Use food dye to color your cake batter. If you use gel or paste then you will only need 1 drop per section for a brilliant, deep color.
  • Drop your batter into the pan one color at a time and bake as normal.
  • Frost and enjoy!
Did you make this recipe?Tag @katrinaskitchen on Instagram with the hashtag #katrinaskitchenrecipes

A Few Notes on Food Coloring

Difference between food color gel and decorating gel

  • I used Americolor GEL food coloring which can be purchased online or at Hobby Lobby (Amazon link provided at the end of this post).
  • Food color gel is NOT decorating gel.
  • Wilton also makes gel food coloring (available at Wal-Mart, Michaels, and JoAnne’s). I do not prefer it but it is more readily available and would produce better results than using liquid food color found in most grocery stores.
  • You use one teeny tiny drop of Americolor gel food coloring to get these vibrant colors. To get a vibrant color with liquid food coloring you may have to add up to a teaspoon of coloring (which I do NOT recommend). The color may still not be as vibrant and adding that much liquid will change the consistency of the dough.
  • I am including the links to the basic color pack and the “electric” colors. I use both sets in my kitchen. To see some more colors check out my Rainbow Chocolate Chip Cookies.

Items used in this recipe:

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