Rainbow Chip Bundt Cake

Rainbow Chip Bundt Cake


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cake and milk

This Betty Crocker Rainbow Chip Bundt Cake was so much fun to make! It was the first time Robert and I made a cake together and I’m confident it won’t be the last. It took some convincing, but it ended up being a great little quarantine date night after Micah went to sleep. It was nice to switch things up, instead of our usual Netflix and chill.

At first, we weren’t sure what we wanted to bake, so I popped over to the pantry to see what we had and boom! The rainbow chip cake was the first thing that caught my eye. I’ve always loved rainbow chip bundt cake, there’s just something so fun about it.

Close up of cake

This recipe is very easy to make. For the cake batter, we followed the directions outlined on the box and added 2 tbsp of sour cream. Adding sour cream to the cake mix adds extra moisture.

cake on cake stand

We decided to whip up our own marshmallow frosting in addition to the cream cheese frosting. This was Robert’s favorite part of the cake! It was a little messy, but honestly, it was fun to get messy in the kitchen together!


  • 1 cup of water
  • ½ cup of vegetable oil
  • 3 eggs
  • 2 tbsp sour cream
  • Betty Crocker cream cheese frosting
  • Betty Crocker decorating decors red sugar

Ingredients for the marshmallows frosting

  • 3 Jumbo marshmallows
  • 3 tbsp of water 
  • A few dashes of red sugar


  • For the cake batter, follow the instructions on the back of the box
  • Allow the cake to cool for 15 minutes
  • Once the cake has cooled, place it on a wire rack on top of a baking sheet
  • Ice the cake with the cream cheese frosting
  • After frosting, grab a pot and put on low/medium heat
  • Add the marshmallows and water and cook until combined. If the consistency is too thick you can add a little bit of water. If it is too watery you can add another marshmallow. It shouldn’t be too watery or too thick. Somewhere in the middle where it will be easy to drizzle on top of the cake. Once you have the right consistency, add a few dashes of the red sugar until the frosting turns pink.
  • Drizzle the cake with the marshmallow frosting
  • Sprinkle additional red sugar on top


I strongly recommend putting the cake on a wire rack on top of a baking sheet before icing. This will prevent you from making a mess when drizzling the marshmallow frosting. Once you are finished frosting you can then transfer the cake to your cake stand with two spatulas. 

I hope you enjoy and have fun making this oh so easy recipe!

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