• Email
  • Pin It

Chocolate Rainbow Cake


Contributed by:

Chocolate Rainbow Cake


9 comments | Leave Comment

1 Star2 Star3 Star4 Star5 Star (0 Rating)
Loading ... Loading ...


Chocolate Rainbow Cake

It is time for Parshat Noach and we needed a new rainbow cake, one for those of us not into making 7 layers of different colored cakes (too much work for me). Plus I prefer a simple chocolate bundt cake. Then all I had to do was decorate with all my colorful Mike and Ike's and for fun I added some rice krispie treats for extra effect. You can make this any time and you can even make one pretty and give the other half to the kids to make their own.


  • Prep Time : 25 min
  • Cook Time : 1 hour
  • Ready Time : 1 hour, 25 min




  • Vegetable oil spray
  • 2 ounces bittersweet chocolate, chopped
  • 3/4 cup coconut oil
  • 1 cup sugar
  • 1 large egg
  • 2 cups all-purpose or white whole wheat flour
  • 1/2 cup Dutch-process cocoa powder
  • 1 tablespoon baking soda
  • 3/4 teaspoon salt
  • 1 cup strong-brewed coffee
  • 1 cup coconut milk mixed with 1 tablespoon lemon juice


  • 1 cup coconut milk
  • 1/4 cup confectioners' sugar
  • Dash salt
  • 1/2 pound bittersweet chocolate, roughly chopped
  • Mike and Ike's (all the colors as needed to make a rainbow


  1. Preheat the oven to 350°. Spray a 12-cup Bundt pan with vegetable oil spray. In a small saucepan, melt 2 ounces of the chopped chocolate over low heat, stirring constantly. Scrape the chocolate into a medium bowl and let cool slightly. Whisk in the oil and sugar until smooth, then whisk in the egg.
  2. In a small bowl, whisk the flour, cocoa powder, baking soda and salt. Add half of the dry ingredients to the chocolate mixture along with 1/2 cup of the coffee and 1/2 cup of the coconut milk mixture; whisk until smooth. Add the remaining dry ingredients, coffee and buttermilk and whisk until smooth.
  3. Pour the batter into the prepared pan and bake in the lower third of the oven for about 45 minutes, or until a toothpick inserted in the center of the cake comes out with a few moist crumbs attached. Let the cake cool on a rack for 10 minutes, then turn it out and let cool completely.

Ganache Frosting

  1. In a large saucepan, bring 1 cup coconut milk, 1/4 cup confectioners’ sugar, and dash salt to a boil. Remove from heat; add 1/2 pound bittersweet chocolate, roughly chopped, and let stand, without stirring, for 1 minute. Whisk just until combined. Refrigerate, stirring occasionally, until spreadable, about 1 hour.

Once cake has cooled and ganache is ready you can decorate your cake.  First cut your cake in half.  You can make two rainbow cakes or leave one just covered with ganache.  For the rainbow cake, spread the ganache all over the cake with a knife or spreader, then carefully place Mike and Ike candies to make a rainbow.  If desired you can put rice krispy treats on the bottom to look like clouds.


About Tamar Genger MA, RD


Tamar lives in New York and is the mother of three amazing children, a Registered Dietitian, professor of Nutrition, and as you can probably guess, a foodie! Tamar loves to travel with her family and visits kosher restaurants wherever she goes. Although she loves the sights, she spends more time talking about the restaurants and food she ate! As a mom and a nutritionist, Tamar tries to balance her passion for healthy cooking with her insatiable desire for chocolate!




9 Responses to Chocolate Rainbow Cake

  1. Cute cake, Tamar! I especially love the crispy rice treat clouds – what a cute touch!

  2. avatar says: jdh1

    The recipe says buttermilk in the directions but coconut milk in the ingredients. Just want to make sure I can use the coconut milk throughout for the parve version. Thank!

    • Oh, thanks, I will fix. I used the coconut milk mixed with lemon as my buttermilk sub and it worked great.

  3. avatar says: Malka 770

    so cute!!! But it’s hard to balance out trying to bake whole grain/sugar free/fat free…and landing one of these on my Shabbos table…might do it anyway……..

    • I agree, I was going to use white whole wheat flour for the cake, but we were bringing it to someone else’s house, so I just went with white. It is a splurge, but a small piece is plenty.

  4. avatar says: Selary

    This is so pretty and so much easier then the layered rainbow cake idea.

  5. avatar says: esti

    thank you so much for this cute idea! i made the layered rainbow cake last year. it looks nice but it was a lot of work and truthfully it tasted awful. thanks for this alternative!

  6. avatar says: steve

    Looks as great as it tastes.

Leave a Reply

Log in or Join For Free or leave a reply as a guest

Your email address will not be published. Required fields are marked *


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

  Notify me of follow-up comments by email

Posted in