Chocolate cake with a piece cut out

Chocolate Mousse Cake

This amazing 3 ingredient Chocolate Mousse Cake is incredibly easy to make and feeds a crowd!

Course Dessert
Cuisine American
Prep Time 20 minutes
Refrigerate 2 hours
Total Time 20 minutes
Servings 12
574 kcal


  • 1 box chocolate graham crackers 3 pack
  • 3 1/2 cups heavy whipping cream separated 1 cup/2 1/2 cups
  • 20 ounces 65% chocolate cacoa chips semi-sweet chips will work as well


  1. Add chocolate chips to large bowl.  REMOVE 1/4 CUP OF THE CHIPS FOR GARNISH.

  2. Heat ONE CUP of the cream in a microwave safe bowl for 2 minutes or until steaming hot.

  3. Pour the hot cream over the chocolate chips and don't touch for 2-3 minutes. 

    Then stir until combined.  This can take a minute or two.  Be patient, it will come together!  You now have chocolate ganache!

  4. Beat remaining 2 1/2 cups whipping cream in large bowl until soft peaks form.  About 5 minutes.

  5. Add 1/2 cup of the warm chocolate cream (ganache) mixture to the whip cream and gently fold a few times to temper the cream.  Add remaining chocolate to the whip cream and fold gently until no white streaks remain.

  6. Line a 9 x 13 baking dish with one layer of graham crackers.  Top with 1/3 of the whip cream and repeat, ending with chocolate mousse.

  7. Garnish with remaining chocolate chips and refrigerate at least 2 hours and up to 3 days in advance.

  8. When ready to serve let it sit out at room temp for about 10 minutes.  Slice and serve!

Recipe Notes

I used 65% cocoa chocolate chips for a deeper chocolate flavor but semi-sweet works great too.  

This is a great MAKE AHEAD CAKE!  Will keep for about 3 days in your fridge.

Let sit out for 10 minutes or so before serving to soften it up a bit.

Nutrition Facts
Chocolate Mousse Cake
Amount Per Serving
Calories 574 Calories from Fat 369
% Daily Value*
Fat 41g63%
Saturated Fat 23g115%
Cholesterol 102mg34%
Sodium 366mg15%
Potassium 134mg4%
Carbohydrates 69g23%
Fiber 2g8%
Sugar 40g44%
Protein 6g12%
Vitamin A 1125IU23%
Vitamin C 0.7mg1%
Calcium 137mg14%
Iron 2.5mg14%
* Percent Daily Values are based on a 2000 calorie diet.