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Vegan Peanut Butter Mousse Cake

October 20, 2022 By Gretchen 32 Comments

You are going to flip over this new peanut butter mousse cake!

It is so creamy and light with a layer of chocolate mouse too!

Brownie base and upside down ganache icing

Globs of edible peanut butter cookie dough and ganache rosettes swirled high!

Vegan Peanut Butter Mousse Cake

 

As usual we are Building On Recipes which is not a surprise when it comes to cakes like this one.

We do have to prepare several recipes to get to the final cake

But trust me it is worth the effort!

For the base I made my favorite brownie recipe so you will want to get that prepared ahead of time.

Just skip the icing because you don’t need that!

And you will want to bake the batter in a round pan, not square

Vegan Fudge Brownies

You can even bake the brownie days ahead and just keep it wrapped well in the refrigerator until you are ready to build the peanut butter mousse cake.

Also since the whipped cream used for the mousse recipes is coconut milk fat,

You will want to be sure to get your cans of coconut milk to the refrigerator to solidify the night before you start.

Raw cookie dough garnish is completely optional but I think it really ties the whole look together!

And who doesn’t love to eat raw cookie dough!?

Just be sure to toast your flour for the recipe first so make it safe to eat raw!

Peanut Butter Mousse Cake

 

Notes for Success & Safety around Raw Dough!

There is an advisory to eating raw cookie dough though.

Since there has been some trouble with raw flour and salmonella and EColi associated with eating raw flour, it is recommended to toast the flour sufficiently first before using it for raw dough applications

Aquafaba is a replacement for the original meringue from egg whites that is used in traditional non vegan mousse recipes

It is the water from a can of chickpeas that when whipped, will transform into the most beautiful glossy thick meringue you have ever seen!

Aquafaba Whipped Meringue

For more tips on using aquafaba CLICK HERE!

Vegan Peanut Butter Mousse Cake

CHECK OUT THE FULL YOUTUBE VIDEO TUTORIAL FOR HOW TO MAKE THIS AWESOME CAKE!

Vegan Peanut Butter Mousse Cake

For more recipes with peanut butter click the links below!

Death by Peanut Butter Fudge Brownie Cheesecake

Vegan Peanut Butter Cups

Peanut Butter Fudge Stuffed Cupcakes

Vegan Peanut Butter Mousse Cake
 
Print
Prep time
4 hours
Total time
4 hours
 

You will need a 5" Ring Mold to assemble this cake
and Acetate Strips
Serves: Serves 6 people
Ingredients
  • ½ Recipe Fudge Brownie
  • For the Peanut Butter Mousse:
  • Creamy Peanut Butter ¾ cup (195g)
  • Milk Alternative 2 tablespoons (30ml)
  • Vanilla Extract 1 teaspoon (5ml)
  • Aquafaba ¼ cup (60ml)
  • Coconut Fat from 1-15oz can full fat coconut milk
  • Granulated Sugar 2 tablespoons (28g)
  • Cream of Tartar ¼ teaspoon
  • For the Chocolate Mousse:
  • Semi Sweet Vegan Chocolate 1 scant cup (113g)
  • Brewed Coffee 2 Tablespoons (28g)
  • Vanilla Extract 1 teaspoon (5ml)
  • Aquafaba ¼ cup (60ml)
  • Coconut Fat from 1-15oz can full fat coconut milk
  • Granulated Sugar 2 tablespoons (28g)
  • Cream of Tartar ¼ teaspoon
  • 1 Recipe Ganache
  • ½ Recipe Peanut Butter Cookie Dough
Instructions
  1. Prepare the brownie recipe as per the instructions on that blog post, and bake it into the same size pan as you will be building your final mousse cake, I have used a 5" ring mold for mine, so I baked the brownie in a 5" cake pan
  2. Prepare the peanut butter mousse by slightly melting the peanut butter, then add the milk alternative and vanilla extract, whisk smooth
  3. Whip the aquafaba on high speed and gradually add the sugar with the cream of tartar. Whip to stiff peaks.
  4. Whip the coconut fat to soft peaks then fold into the peanut butter base.
  5. Fold in the aquafaba last and then pour into the ring mold fitted with the brownie base.
  6. Freeze while you prepare the chocolate mousse.
  7. Melt the chocolate and then add the brewed coffee and vanilla extract. Whisk smooth
  8. Fold in the whipped coconut cream and then the aquafaba and pour the mousse over top of the peanut butter mousse in the ring mold
  9. Freeze for at least 4 hours or until it is set and firm.
  10. While the cake is setting prepare the cookie dough recipe as per the instructions on that page just be sure to toast the flour on a sheet pan at 350°F for 10 minutes to kill any bacteria that could be present since you are not going to be baking the dough into cookies.
  11. Also, you will see that the cookie recipe I am using listed fudge filling, but you will only prepare the dough part, not the fudge filling part
  12. Prepare the ganache by warming the chocolate with the milk alternative over low heat stirring constantly until smooth.
  13. Pour the ganache over the top of the frozen mousse cake, then refrigerate until serving.
  14. The remaining ganache will set to a pipeable consistency for the rosette decor
  15. *Optional garnishes as shown in the video
Notes
Mousse cake must be kept refrigerated at all times.

Will stay fresh for up to 1 week.

Freeze for longer storage, wrapped well for up to 1 month
3.5.3251

 

 

Filed Under: All Recipes, Cake Recipes, Layer Cakes, Mousse Recipes, No Bake Desserts

Previous Post: « Vegan Eclairs ~ Pâte à Choux Recipe
Next Post: 8 Vegan Holiday Cakes ~ from beginner to advanced »

Reader Interactions

Comments

  1. Terri

    May 4, 2017 at 1:49 am

    Again Gretchen you have made a masterpiece. I will need to get 5 friends over or I’ll eat the whole.thing thing myself. I noticed that this time you didn’t reduce and chill overnight the aquafaba. Obviously it works without that step.

    Reply
    • Gretchen

      May 4, 2017 at 1:57 am

      LOL! You may regret those 5 friends! (Or just make 2 and hide 1!) Correct no need to reduce the AF

      Reply
  2. Lillian

    May 4, 2017 at 11:37 pm

    This looks fabulous! Is there a way another alternative to a ring mold, which I don’t have? Would a spring mold work?

    Reply
    • Gretchen

      May 5, 2017 at 12:40 am

      Yes! this is the BEST way to use a springform pan! (no bottom!)

      Reply
  3. lillian

    May 12, 2017 at 5:04 am

    I made it and it was delicious! Everyone loved it, espcieally the peanut butter mousse. I will cut down on the milk because my ganache came out too runny. Definitely a hit! Thanks for the recipe!

    Reply
    • lillian

      May 12, 2017 at 5:05 am

      And the springform worked like a dream!

      Reply
  4. CiCi

    June 11, 2017 at 7:19 pm

    This looks amazing! Does it scale well? I’d like to make a larger version for a party – maybe 8 or 9″ ?

    Reply
    • Gretchen

      June 12, 2017 at 12:28 am

      thanks! Yes sure double for 8″ cake

      Reply
  5. CiCi

    June 12, 2017 at 2:19 am

    Thank you!

    Reply
  6. V. Gomathy hri

    June 23, 2017 at 5:47 pm

    Hi Gretchen, all your. Recipes are awesome. In this mousse recipe. Can I replace coconut fat with normal heavy cream. If so how much heavy cream I need to use.

    Reply
    • Gretchen

      June 23, 2017 at 6:08 pm

      yes same quantities as listed for the regular heavy cream

      Reply
      • V. Gomathy shri

        June 30, 2017 at 7:23 am

        Hi Gretchen, substituting heavy cream with coconut milk. coconut milk in 15oz can. Out of that we are not using the sedimented water in that after refrigeration. 15oz comes to 444ml. If I use 444 ml of heavy cream. Won’t it be more of heavy cream. Kindly clarify how much of heavy cream to use.

        Reply
  7. V. Gomathy shri

    June 23, 2017 at 6:13 pm

    Hi Gretchen, I would like to make white chocolate Mousse. Can just replace the quantity of semi sweet chocolate with white chocolate. Or how much quantity of white chocolate I need to use. Can quantity of other ingredients be same. Please suggest

    Reply
    • Gretchen

      June 24, 2017 at 1:16 am

      CLICK HERE FOR A RECIPE TO FOLLOW and then yes to white chocolate in place

      Reply
      • V. Gomathy shri

        June 29, 2017 at 6:09 pm

        Hi Gretchen, I have small doubt. You have not used agar here in this recipe. Is it not necessary to use gelatin or agar agar for mousse. Or is it not needed. Please clarify.

        Also I have some queries outside of the above recipe. Queries about agar agar that is used in “agar agar mentioned recipes”. I get only agar agar bar here in my country. Also it is not standard size bar. Here it is measured in grams. I get 2 to 3 bars together 10g. I tried to powder it in coffee blender as you said. But it s not getting powdered to fine powder. It is becoming smaller flakes. I saw photo of agar flakes. The flakes that I made are smaller than the agar flakes that is available in amazon.com. Also the flake are yellowish in US market, but the the one I made is whitesh transparent. So I don’t know how to measure. Will the agar agar powder available in US market be very fine powder ? The agar bar I get here is whitesh transparent one. Can I use this whitesh agar flakes in recipe. Please clarify.

        Is it possible for you to tell in the amount of agar agar used in recipe in grams. How many grams does 1 teaspoon of agar will be ? Please clarify.

        Reply
  8. V. Gomathy shri

    June 29, 2017 at 6:08 pm

    Hi Gretchen, I have small doubt. You have not used agar here in this recipe. Is it not necessary to use gelatin or agar agar for mousse. Or is it not needed. Please clarify.

    Also I have some queries outside of the above recipe. Queries about agar agar that is used in “agar agar mentioned recipes”. I get only agar agar bar here in my country. Also it is not standard size bar. Here it is measured in grams. I get 2 to 3 bars together 10g. I tried to powder it in coffee blender as you said. But it s not getting powdered to fine powder. It is becoming smaller flakes. I saw photo of agar flakes. The flakes that I made are smaller than the agar flakes that is available in amazon.com. Also the flake are yellowish in US market, but the the one I made is whitesh transparent. So I don’t know how to measure. Will the agar agar powder available in US market be very fine powder ? The agar bar I get here is whitesh transparent one. Can I use this whitesh agar flakes in recipe. Please clarify.

    Is it possible for you to tell in the amount of agar agar used in recipe in grams. How many grams does 1 teaspoon of agar will be ? Please clarify.

    Reply
  9. Alison

    July 1, 2017 at 12:46 pm

    Looks fabulous! Can you just confirm that it is not served frozen? Cheers.

    Reply
    • Gretchen

      July 2, 2017 at 9:15 pm

      thanks! Correct not served frozen

      Reply
  10. V. Gomathy shri

    July 3, 2017 at 8:50 am

    Hi Gretchen, substituting heavy cream with coconut milk. coconut milk in 15oz can. Out of that we are not using the sedimented water in that after refrigeration. 15oz comes to 444ml. If I use 444 ml of heavy cream. Won’t it be more of heavy cream. Kindly clarify how much of heavy cream to use.

    Reply
    • Gretchen

      July 5, 2017 at 9:35 pm

      Thats correct so it would be about 1 cup of whipped cream after it has been whipped – which is approx 1/2 cup liquid cream

      Reply
      • V. Gomathy shri

        July 6, 2017 at 12:29 pm

        Thanks for your reply

        Reply
  11. V. Gomathy shri

    July 6, 2017 at 12:30 pm

    Hi Gretchen, I have small doubt. You have not used agar here in this recipe. Is it not necessary to use gelatin or agar agar for mousse. Or is it not needed. Please clarify.

    Also I have some queries outside of the above recipe. Queries about agar agar that is used in “agar agar mentioned recipes”. I get only agar agar bar here in my country. Also it is not standard size bar. Here it is measured in grams. I get 2 to 3 bars together 10g. I tried to powder it in coffee blender as you said. But it s not getting powdered to fine powder. It is becoming smaller flakes. I saw photo of agar flakes. The flakes that I made are smaller than the agar flakes that is available in amazon.com. Also the flake are yellowish color in US market, but the the one I made is whitesh transparent. So I don’t know how to measure. Will the agar agar powder available in US market be very fine powder ? The agar bar I get here is whitesh transparent one. Can I use this whitesh agar flakes in recipe. Please clarify.

    Is it possible for you to tell in the amount of agar agar used in recipe in grams. How many grams does 1 teaspoon of agar will be ? Please clarify.

    Reply
  12. Leary

    November 15, 2017 at 5:13 am

    I need to make bigger cake?

    Please tell me.

    Reply
    • Gretchen

      November 15, 2017 at 2:49 pm

      sure you can double or triple the ingredients to suit you

      Reply
  13. Margaret Berger

    November 24, 2017 at 9:19 pm

    I just made this for Thanksgiving with an Oreo crust – I’ve made the PB a few times now but this was the first time with the double layer. It was devoured. I love this recipe. I drizzled chocolate and PB over it because I think it looks pretty but I just used your ganache recipe. FYI I subbed the coconut water wherever you called for nut milk, and it worked out just fine. Delicious! Love this!

    Reply
    • Gretchen

      November 26, 2017 at 9:50 pm

      awesome thankyou for the variation tip!

      Reply
  14. Magda

    March 28, 2019 at 5:58 pm

    Hi 🙂 My mousse cake tasted perfectly, but unfortunately it didnt have such a great stability as yours.. any idea why? Its really like a mousse, almost impossible to cut it and not ruining the rest of the cake. My piece definietly doesn’t look like yours 😀
    I didn’t have cream of tartar (its hard to get it in Poland), so i used a small amount of apple vinegar (as i always do in recipies with aquafaba). I also didnt use a milk alternative as my peanut butter seemed to be runny even without warming it up – so i didn’t do it either ;x I also skipped the brewed coffe as I cannot drink any coffee. Could any of that things can be a reason or is it sth else? Maybe you cut it just before freezing, like.. when it is a little bit freezed out? I freezed it for 3 hours and then the cake went to the fridge for a night. In the morning I took it from a fridge, tried to cut into pieces and it was messy.

    If you have any idea what can i change next time (I’m not giving up! :D) – i would be very greatful.
    Thank you in advance! 🙂

    Reply
    • Gretchen

      March 28, 2019 at 6:17 pm

      Hmm, seems that by leaving out some of the liquid (coffee) if would be more stiff rather than runny!. I do find the aquafaba to be tricky sometimes, if you do not get the right consistency it will break down and get runny over time (or not set at all) The cream of tartar has definitely proven to help, but I know not meny people can easily get that.
      You mentioned your peanut butter was runny even before melting, but I am not sure that was the culprit since I actually melt mine to get it to that consistency.
      CLICK HERE for more about AF Success in recipes

      Reply
  15. valerie magunar

    June 22, 2019 at 7:42 pm

    hello,
    love your recipes.
    can use pistachio butter instesd of peanut butter?

    Reply
    • Gretchen

      June 22, 2019 at 9:02 pm

      Thanks! Sure, I think it would work as long as it is the same (or at least similar consistency)

      Reply
  16. Nima

    January 2, 2020 at 2:21 pm

    Hello, two questions please. For those with coconut allergies, do you think a vegan whipped cream substitute could work in place of the coconut? Also, when you say “freeze for longer storage” is there a special technique for wrapping/protecting it? I would like to experiment this weekend, when I have time, but not for immediate consumption. Thanks so much!!!

    Reply
    • Gretchen

      January 5, 2020 at 2:05 am

      yes a vegan whipped cream substitute should work CLICK HERE FOR MORE
      You can wrap it in plastic wrap to protect for longer storage

      Reply

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Yep, it's me Gretchen~ Owner of Gretchen's Bakery. Well, I no longer own a physical bakery since I sold mine in late 2014 & since 2016 I make nothing but the best vegan recipes! Read More…

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