Triple Layer Chocolate Mousse Cake

If you’re a chocolate lover, the recipe for Triple Layer Chocolate Mousse Cake is a must-have! Plus, it’s so pretty with all the chocolate curls on top. Of course, you can skip the curls but they really add a wow factor to this cake.

Triple Layer Chocolate Mousse Cake

Every time I make this Triple Layer Chocolate Mousse Cake, it always takes me down memory lane. I remember when my oldest daughter was president of the student council at her high school. We hosted a Christmas party for all the officers and the teacher in charge of the council.

I don’t know why, but I was a little nervous hosting my daughter’s teacher. Of course, the party was over-the-top amazing because I served Triple Layer Chocolate Mousse Cake. The next day, my daughter’s teacher asked for the recipe and kept talking about how good the cake tasted. It must have been good because there wasn’t a single crumb left after the party.

How to Make Triple Layer Chocolate Mousse Cake

I’ve made Triple Layer Chocolate Mousse Cake many times since then, but I always think back to that time I hosted that group of high school kids and how much they all loved the cake.

I hope you enjoy this cake as much as we do! It’s the perfect cake for birthday parties and special occasions. It’s also just the thing when you’re having a chocolate craving. Trust me!

Triple Layer Chocolate Mousse Cake

The frosting on this cake is delicious. Be sure and chill the mixing bowl and beater before making the frosting. I usually pop the bowl/beater in the fridge while the cake layers bake.

Before making the frosting, sprinkle unflavored gelatin over two tablespoons of cold water.

How to Make Triple Layer Chocolate Cake

Then add the 1/4 cup boiling water and stir until well combined and clear.

Triple Layer Chocolate Mousse Cake

Be careful not to overbeat the frosting. You want soft peaks before adding the unflavored gelatin. Once, I got busy cleaning the kitchen and I almost had stiff peaks. Oops.

The chocolate curls are optional but I always add them.

Chocolate Curls for Triple Chocolate Mousse Cake

Triple Layer Chocolate Mousse Cake

Triple Layer Chocolate Mousse Cake


  • 2 cups sugar
  • 1-3/4 cups plain flour
  • 3/4 cup cocoa
  • 1-1/2 teaspoons baking soda
  • 1-1/2 teaspoons baking powder
  • 1 teaspoon salt
  • 2 eggs
  • 1 cup milk
  • 1/2 cup vegetable oil
  • 2 teaspoons vanilla
  • 1 cup boiling water
  • Chocolate Mousse (frosting)
  • 1 envelope unflavored gelatin
  • 2 Tablespoons cold water
  • 1/4 cup boiling water
  • 1 cup sugar
  • 1/2 cup cocoa
  • 2 cups heavy cream, chilled
  • 2 teaspoons vanilla


  1. Preheat oven to 350º F. Grease and flour three cake pans.
  2. Combine sugar, flour, cocoa, baking soda, baking powder and salt. Add eggs, milk and vanilla.
  3. Beat 2 minutes at medium speed. Stir in boiling water. Batter will be thin.
  4. Pour batter into the cake pans and bake for 30-35 minutes OR until a toothpick inserted near the center of the cake comes out clean.
  5. Cool in pans on wire rack for 10 minutes. Remove cakes from pans and let cool completely on rack.
  6. Chocolate Mousse
  7. In a small bowl, sprinkle gelatin over cold water. Let stand one minute.
  8. Add 1/4 cup boiling water and stir until gelatin is dissolved and mixture is clear. Cool slightly.
  9. In a large chilled bowl, stir together sugar and cocoa. Add heavy cream and vanilla. Beat at medium speed until soft peaks form. Add gelatin and beat until well blended.
  10. Refrigerate for 30 minutes before using.
  11. Fill and frost cake. Refrigerate one hour before serving. Optional: Add chocolate curls to the top of the cake before serving.
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Helpful Hint: Click here to see how to make chocolate curls! They are so pretty when placed on top of the Triple Chocolate Mousse Cake.

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Triple Layer Chocolate Mousse Cake

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About Alli

Southern, Morning Person, Jesus Girl, Frugal Party Planner, Writer/Blogger, Mom, Nana, Wife, Beach Bum Wannabe - Let's Have a Party!


  1. This cake sounds like a real winner. I would love to make this for my Christmas guests because I know what a big hit it would be.

  2. Triple layer. Take about over the top delicious and full of chocolate. Beautiful looking cake but will taste even better.

  3. Yes please. I am a person who is a total chocoholic, so I’d gobble this right up. It looks spectacular.
    Amber Myers recently posted…How To Survive A Work Christmas PartyMy Profile

  4. Oh man … that does look amazing. I wish I was better at cooking desserts! I’m more of an entree/savory dish type of gal. 🙂

  5. That cake looks fantastic! I totally wish that I could reach through the screen and grab a piece for myself right now.
    valmg @ Mom Knows It All recently posted…2017 HOLIDAY GIFT GUIDE – Bratpack Portable Baby Changing Station And Gear BagMy Profile

  6. Triple chocolate?! Yes, please, yum! This cake looks and sounds just perfect.
    Joanna @ Everyday Made Fresh recently posted…10 Recipe Ideas for Christmas BreakfastMy Profile

  7. Now you are totally speaking my language! Anything chocolate is number one on my list and so when you say triple layer chocolate mousse I am all over that.
    Jeanettte recently posted…Tips and Tricks to Avoid Holiday OverindulgingMy Profile

  8. This chocolate mousse cake looks so decadent. I need to try making one, I like treating myself to chocolate dessert once in a while.
    Natalie recently posted…Top 10 Christmas Movies to Watch on Netflix + Giveaway!My Profile

  9. This triple layer chocolate mousse cake will be a hit here for sure! What a delicious idea to make for dessert or our holiday gatherings

  10. I love anything with chocolate mousse involved. This sounds like a crowd pleasing recipe.

  11. Claudia Krusch says:

    Oh my this Triple Layer Chocolate Mousse Cake looks so amazing. I would love to serve it for dessert over the holidays. I am sure it would be a big hit.

  12. This is the kind of cake I need! Yum, I think this would look really nice with our decorations!

  13. Alli strikes again!!! OH MY FREAKING goodness this looks so good! I love chocolate so I”m all for it, I also think I need to give the italian cake a try.
    Mellissa recently posted…Clear The WayMy Profile

  14. Oh wow, this looks amazing! These kinds of recipes always make me want to get to baking. Which gets me in trouble because then I want to eat it all! I will have to make this when we have other people coming over to help me eat it.
    Emily recently posted…How to make a simple holiday dining room table centerpieceMy Profile

  15. Our Family World says:

    I love anything chocolate mousse related! This cake recipe is fantastic. Even if I am not a really good baker, I will try my best making this cakes, so wish me all the luck!

  16. That looks so fluffy and moist, yum! Can I have a slice please? I wish I could bake as good as you!
    Chubskulit Rose recently posted…5 Board Games that You Should Buy to Have Fun with Your FamilyMy Profile

  17. It is easy to see why the student’s and your daughter’s teacher loved the cake, it looks absolutely delicious. Thanks for the tip about putting the bowl in fridge.
    Anosa recently posted…5 Places To See In MexicoMy Profile

  18. Jacqui Odell says:

    I had chocolate mousse for the first time last week and it was amazing! I can only imagine it as a cake!! I have to try this.

  19. OMG! I love a good chocolate mousse cake and yours looks so delicious. I’l have to try your recipe.

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