Chocolate Mousse Cake

It was my husband’s birthday right after Mother’s Day. I knew I needed to make him a chocolate cake because that’s his absolute favorite. I had leftover mousse from my Mother’s Day crepes and decided to create this cake. It was tasty and a hit with him and the family. You could use whatever chocolate cake you want as the base. I just used one from a box. It’s easy to make but looks so impressive.

Chocolate Mousse Cake

2 prepared 8″ or 9″ round chocolate cakes (I just used a Betty Crocker Chocolate Fudge cake)

Chocolate Mousse (I have posted this before so follow the link. I used leftover mousse, but I would recommend making a double batch for the center)

Chocolate Buttercream Frosting
(This is the link to the frosting recipe I used from Southern Living that is found on I just made one recipe and it was just enough to cover the cake. Next time, I’ll do 1 1/2 recipes to give some more frosting to decorate the cake.)

Place one of the round cakes on your serving plate and top with chocolate mousse. Top with remaining cake round and frost entire cake with chocolate buttercream frosting. Be careful at the spots where the chocolate mousse is. You need to get the frosting to just cover those spots, if you spread to much in those areas the chocolate mousse can get mixed into the frosting. Keep cake in the refrigerator until ready to serve. You can bring it out a little before serving to allow the frosting to soften.

22 comments on “Chocolate Mousse Cake

  • Hi, I saved and made this recipe back in 2015 and I was looking for it again since I lost it but now there is nothing here for this chocolate mousse cake. Can you please send me the full recipe?? Thank you!

  • Hi! I followed all of the steps for making the mousse and it looked great until I added the gelatin mixture. Now it’s turned back into more of a liquid. Can you please help?

  • Should the cake be refrigerated after it is made because of the mousse filling? i want to make this cake for my daughter’s birthday but I want to cover the cake with fondant and i will not be able to refrigerate the cake once i cover it with fondant.

    Thank you


  • great resources here. I’ll be back for the next your posting. keep writing and happy blogging.

  • I found it…thanks!

  • Lori, you should be able to find it near the jello. It is usually found on the top shelf of my grocery store. The brand I use is Knox. It's in packaging that's orange and white with a slice of cheesecake on it. Here's a link to see what the package looks like. hope this helps.


  • Hi! I am hoping to make this cake over the weekend, but I couldn't find unflavored gelatin. Maybe I was looking in the wrong place (Jell-o)? Could you tell me what brand you use and where I can find it at the supermarket?


  • Ok, this chocolate mousse cake looks totally perfect! How did you get it to look so even and exact? Beautiful! And your photography skills are excellent. I will definitely have to check back often to see what other treats you create!

    I just started a baking blog a couple of months ago and would love to share it with you. Please take a moment to check it out and tell me what you think.


  • Hi! I just found your blog today. This cake looks SO GOOD! I'm going to have to try it. Hey I had a question about some of the features you have in your blog… Would you mind emailing me at BeantownBaker at gmail dot com? (I'm specifically wondering how you got the Stumble it and bookmark features on each post – I haven't been able to figure that out on blogspot…)

  • That looks amazing and perfect!

  • Wow, that looks GORGEOUS! I’m sure it was amazing. I have this killer recipe for a chocolate slow cooker cake recipe that this reminds me of. Wish I knew where it was… We served it at a preparedness party I hosted.
    I’ll have to find it and blog it!

  • Yes, this picture went through photo shop. I usually have to use photo shop for all my pictures. Lightening is hardly ever perfect for me. That’s probably the thing I have to do the most to help make the picture pretty!

  • Did you photoshop this image?

  • i love how perfect this slice looks. gorgeous!!


  • I am drooling! YUMMY!!!

  • Wow, that’s impressive!

  • i have to second melanie on the apple tart!! SO easy, SO delicious and now all my friends know about it! i am loving this cake. i am going to make it with my girls tonight while the boys are out camping! YUM!!

  • This looks amazing…I’m going to try to make this for Father’s Day. I wanted to add…have you seen the apple tart just posted on Pioneer Woman? It’s so easy I’ve been telling everyone about it…

  • Laura you are so smart! I never thought to use the chocolate mousse in cake, but this is perfect!!


  • That looks like one luscious piece of cake! I love all that thick chocolate mousse frosting!

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