This decadent chocolate coconut cake recipe is topped with a creamy coconut marshmallow sauce and finished off with a layer of chocolate frosting. My husband’s absolute favorite cake!

If you’re a chocolate lover, you’ll most definitely enjoy this cake. It’s loaded with different flavors and textures and is a unique addition to any celebration. Looking for more chocolate recipes? Try my brownie pizza and chocolate pudding cake.

A slice of chocolate coconut cake finished with chocolate sprinkles.

I started making this chocolate coconut cake years ago when I first learned to cook. I’ve adapted the recipe over time and can confidently say that if you’re a coconut fan, you will love this cake. My husband asks for this cake every year for his birthday, he can’t be swayed by the pretty pictures of other cakes I show him in magazines or on Pinterest. He’s declared this one to be his favorite.

How do you make chocolate coconut cake?

This chocolate coconut cake starts with a single layer of chocolate cake. But no one’s that excited by a plain, unadorned piece of chocolate cake. It’s the coconut sauce that makes this one special.

When you melt marshmallows with a little milk and sugar and add coconut to the mix, something really magical happens. It forms this thick and creamy sauce which then gets spread over the cake. The sauce firms up as it cools, which means it won’t run all over the place when you cut the cake. The final touch is a layer of chocolate frosting that gets poured over the top.

Chocolate Coconut Cake Recipe | Easy Chocolate Cake | Chocolate and Coconut Recipe #cake #chocolate #coconut #dessert #dinneratthezoo

A pan of chocolate coconut cake topped with frosting and sprinkles.

The cake is pretty straightforward to make – the one thing I want to mention is that the chocolate frosting is almost like a really thick glaze. It’s best to pour it evenly over the top rather than spread it with a knife, because as it cools it will not spread smoothly. To get a nice glossy coating like in my pictures, pour it and then don’t touch it again!

A fork taking a piece of chocolate coconut cake.

Whether you’re celebrating a birthday or just want a sweet treat to serve after dinner, no one can ever turn down a slice of cake. This chocolate coconut cake is the perfect all-occasion treat! Or in my case, the perfect annual birthday treat for my husband.

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This post was originally published on July 9, 2015 and was recently updated with new photos and recipe instructions.

More fabulous dessert recipes

Chocolate coconut cake video

4.88 from 8 votes

Chocolate Coconut Cake

AuthorSara Welch
This chocolate coconut cake recipe is a rich chocolate cake topped with a creamy coconut marshmallow sauce and finished off with a layer of chocolate frosting.
This chocolate coconut cake features a layer of rich chocolate cake topped with a creamy coconut sauce and chocolate frosting. Adapted from All Recipes and Cooking Light.
Prep Time20 minutes
Cook Time30 minutes
Total Time50 minutes
Course Dessert
Cuisine American
Serves 12


For the chocolate cake:

  • 1 box devil's food cake mix
  • oil, eggs and water as directed on cake mix package
  • cooking spray

For the coconut sauce:

  • 3/4 cup milk
  • 3/4 cup granulated sugar
  • 15 large marshmallows
  • 3 cups flaked sweetened coconut
  • 3/4 teaspoon cornstarch

For the chocolate frosting:

  • 3 tablespoons butter
  • 6 tablespoons granulated sugar
  • 4 1/2 tablespoons cocoa powder sifted
  • 4 1/2 tablespoons milk
  • 2 and 1/2 cups powdered sugar
  • 1 teaspoon vanilla extract
  • 1/2 cup chocolate sprinkles


  • For the cake: Coat a 9"x13" pan with cooking spray. Prepare the cake mix with the oil, eggs and water in amounts as directed on the box and bake according to package instructions. Cool completely in the pan.
  • For the coconut sauce: Combine milk, sugar and marshmallows in a medium saucepan, cook over medium heat for 5 minutes or until the marshmallows are melted.
  • Stir in coconut and cornstarch, bring to a boil. Cook one minute, stirring constantly. Remove from heat and pour the coconut sauce over the cake while it's still warm, then let cool completely before you add the frosting.
  • For the frosting: Melt butter in a small, heavy saucepan over low heat. Add granulated sugar, milk and cocoa powder, cook for 2-3 minutes or until mixture is thoroughly combined.
  • Remove from heat and cool slightly. Stir in powdered sugar and vanilla. Pour over the cake. Add the sprinkles on top while the frosting is still warm. Do not try to spread the frosting with a knife or it will not set properly.


Make Ahead: The entire cake can be made a day in advance.
Little Helpers: Sprinkle time! Let your kids do the decorating


Serving: 1g | Calories: 394kcal | Carbohydrates: 64g | Protein: 3g | Fat: 15g | Saturated Fat: 9g | Cholesterol: 9mg | Sodium: 392mg | Potassium: 251mg | Fiber: 3g | Sugar: 47g | Vitamin A: 120IU | Calcium: 83mg | Iron: 2.2mg

Hello! I’m Sara!

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Recipe Rating


  1. Is 41/2 Tblspns if milk the correct amount of milk in the frosting? When I added the 2 1/2 cups of powdered sugar this became a paste. I used the 3 Tblspns of butter as directed plus all the other ingredients. I thinned it with milk so hopefully it will be okay.

    1. That’s the correct amount. It makes a thicker frosting. If you want to thin it, you can add a little extra milk. -The Dinner At The Zoo Team

  2. 5 stars
    We adore this cake! It tastes like a Bounty bar. So delicious! Baking isn’t my strongest cooking skill but I love the ease of this recipe and encourage everyone to give it a try. You will love it.

  3. 5 stars
    I’ve made this cake 3 times now so it was time to leave a comment! We love this cake that’s sort of like a Mounds bar! Thanks for the recipe and love your site!

  4. Hello, making this cake today, a day in advance of my husband’s birthday. Do I put it in refrigerator once it’s done or leave it outside?

  5. 5 stars
    I just made this cake but I made it into a poke cake with homemade chocolate pudding. It’s in the fridge right now cooling, so I hope it turn out yummy!

  6. Making this lovely cake for Fathers Day! I have some dads who are coconut and chocolate lovers. Don’t think I can go wrong!

  7. I’m not usually a huge chocolate cake person, but THIS one… a different story!

  8. That marshmallow sauce does sound magical. I don’t only used the store bought creme so I’m intrigued!

  9. This cake looks AMAZINGGG! I am a huge coconut fan! Pinned! Can’t wait to try this one out!

  10. I am raising my hand so high right now! I love anything with coconut, chocolate and marshmallow!