Vegan Chocolate Mousse Cake (High Protein)

by Alena
Dec 19, 2020
white plate with homemade vegan chocolate mousse cake topped with blackberries

This healthy vegan chocolate mousse cake comes with an easy homemade cookie crust and uses only whole food ingredients! Easily customizable to serve it year-round, this cake recipe is low in sugar, protein-packed and oh-so-chocolatey.

If you ever want to make a creamy cake for your non-vegan friends or family, this is it. 

With a melt-in-your-mouth vegan chocolate mousse that utilizes a secret ingredient you probably already have in your pantry, nobody will believe that this cake is completely plant-based.

Our vegan chocolate mousse cake is not overly sweet (although you can totally bump up the sweetness factor if you like!), beyond delicious and also stores well.

There’s even a trick to make the high-protein cookie crust the day before to save you some precious time the day you want to serve your chocolate cake!

Taking only 30 minutes of hands-on preparation and a few handy kitchen tools like a food processor, baking pan (or cast-iron skillet), small bowl and a hand whisk, our vegan chocolate mousse cake recipe is totally doable for non-trained chefs.

side view of vegan chocolate mousse cake one slice of which is being taken out

The Best Vegan Chocolate Mousse Cake

  • Rich, creamy & not overly sweet
  • Undetectably vegan & whole food plant-based
  • Crowd-pleasing and beautiful
  • High in protein & low in sugar
  • Super satisfying but not too heavy
  • Accessible ingredients
  • So chocolatey yet good for you

We love dressing up this chocolate mousse cake in a different way every time we make it so it’s appropriate for any occasion or season! Find our favorite topping ideas below.

table with different-sized bowls containing chickpeas, chocolate, flour, dates, spices and peanut butter
top view of a food processor that's fuilled with dates, melted chocolate and cubed silken tofu

Vegan Protein Cake Ingredients

  • Dates — great for both texture and taste, this dried fruit allows us to keep our chocolate mousse cake completely refined sugar free.
  • Almond Butter — can be replaced with cashew butter or applesauce (for a lower fat version).
  • Almond + Oat Flour — keeping this vegan chocolate mousse cake completely gluten-free and inclusive; make your own flours at home in a blender if you like.
  • Chickpeas — one 15-oz can of these healthy legumes is our protein-packed secret ingredient for this cake!
  • Silken Tofu — another higher protein key component for our delicious chocolate mousse!
  • Dark Chocolate — this goes into our vegan mousse, crust and can be used as a cake decoration.

Just a handful of more everyday baking staples like salt or vanilla extract and you’re already good to go! Here are the steps you need to follow.

How to Make Vegan Chocolate Mousse Cake

food processor jar with freshly blended sweet chickpea mixture
woman in white apron putting cookie dough into baking pan with a spoon

Make the Chickpea Cookie Crust

  1. Start by preheating your oven to 345° F (175° C) and prepare a cast iron skillet or round baking dish for the crust.
  2. Get a food processor and put the dates, almond butter and vanilla extract into it. Pulse and process to obtain a puree.
  3. Next, add the chickpeas, almond flour, oat flour, baking powder and a sprinkle of salt if you like. Process again to obtain a thick, smooth and creamy batter. Stop and scrape down the sides as needed.
  4. Using your food processor or a spoon, you can fold in the chocolate chunks. This step is optional, as you can leave the crust plain without any chocolate if you like.
  5. Adjust your dough to taste preferences, then distribute it evenly in your prepared skillet or baking dish. This works best with the back of a spoon or wetted fingers.
  6. Finally, put it into the oven for around 20 minutes or until cooked through. Once your crust is done baking, remove it from the oven and let it cool.
white bowl with fluffy aquafaba that's being mixed with chocolate

Make the Chocolate Mousse

  1. Clean your food processor jar and put the soaked dates into it, making sure they are well-drained. Pulse to obtain a smooth date paste.
  2. Add your silken tofu and melted chocolate to the dates. Process again until a creamy batter forms.
  3. Make the fluffy aquafaba by pouring the chickpea liquid into a medium-sized bowl and whipping it with a hand mixer. Don’t give up too soon, this can take a few minutes!
  4. Once it’s all nice and frothy, carefully add the tofu, date and chocolate mixture from your food processor into the bowl. Gently incorporate with a whisk until you have a homogeneous chocolate mousse!
hand spreading vegan aquafaba chocolate mousse on a vegan cookie crust

Assemble the Chocolate Mousse Cake

  1. Once the chickpea crust has cooled completely, add the chocolate mousse on top! Using the back of a spoon, you can distribute it evenly to create a thick layer.
  2. Time to decorate! Get some blackberries, grated chocolate, crushed pistachios and coarse salt and arrange to your liking. More topping ideas can be found below this section.
  3. Finally, refrigerate your homemade vegan chocolate mousse cake for around an hour before cutting it into slices and serving it!
vegan high protein chocolate mousse cake on a plate being decorated by a hand with crushed pistachios

Tips for This Recipe

You can make this a no-bake vegan chocolate mousse cake by using a different crust! The recipe for our vegan fruit tarts showcases how you can make an easy no-bake crust using just dates, almonds, rolled oats and a frozen banana.

Vegan Cake Topping Ideas

front view of a half eaten chocolate mousse cake slice with a frozen blackberry

Vegan Chocolate Mousse Variations

The great thing is that because you already need some chickpeas for the cookie crust, you automatically have chickpea liquid on hand to create the fluffy chocolate mousse.

But what if you don’t have a hand whisk? Trying to get the aquafaba to become frothy in your high-speed blender will leave you disappointed, I’m afraid.

Luckily, you can make vegan chocolate mousse using canned coconut cream or ripe avocados! We just love the convenience of using up the chickpea liquid and adding some healthy plant-based protein with the silken tofu.

Prepping & Storage

You can bake the chickpea cookie crust up to 2 days ahead of time and store it in the fridge! This trick allows you to put your vegan chocolate mousse cake together in just 15 minutes. 

Just make the aquafaba chocolate mousse the day you want to serve your cake, get the cookie crust from the fridge and assemble your dessert! It still needs some resting time for the mousse layer, though.

Any leftover chocolate mousse cake can be stored in the fridge for up to 3 days — it honestly just never lasted longer than that in our house. We haven’t tried freezing this cake. 

top view of high protein chocolate cake topped with blackberries and chocolate chunks with two slices being cut

More Healthy Vegan Dessert Recipes

Creating whole food plant-based versions of our favorite desserts is totally our jam! Try these sugar-free and oil-free vegan treats next.

Did you try our healthy vegan chocolate mousse cake recipe? We’d love to hear about your experience in the comments below. You can also rate and Pin the recipe here or tag us on Instagram so we can see your creations.

side view of vegan chocolate mousse cake one slice of which is being taken out

Vegan Chocolate Mousse Cake Recipe

Yield: 12 slices
Prep Time: 30 minutes
Cook Time: 20 minutes
Additional Time: 1 hour
Total Time: 1 hour 50 minutes

The best vegan chocolate mousse cake made with whole food ingredients that’s perfect to serve year-round. Undetectably protein-rich and plant-based, this oh-so-chocolatey dessert needs around 30 minutes of prep time, budget-friendly staples and is super crowd-pleasing. 

Ingredients

Cookie Crust

  • 6 dates, pitted (60 g)
  • 2 tbsp almond butter (32 g)
  • 1 tsp vanilla extract
  • 1 15-oz can chickpeas, cooked & drained (about 240 g)
  • ½ cup almond flour (56 g)
  • 2 tbsp oat flour (16 g)
  • 1 tsp baking powder
  • Pinch of salt (optional)
  • ⅓ cup chopped dark chocolate (60 g)

Chocolate Mousse

  • 1 cup dates, pitted and soaked (150 g)
  • 1 cup silken tofu (250 g)
  • 1 cup dark chocolate, melted (140 g)
  • ½ cup aquafaba/chickpea liquid (120 ml)

Cake Toppings

  • Blackberries
  • Shaved chocolate
  • Crushed pistachios
  • Coarse salt

Instructions

Make the Cookie Crust

  1. Preheat your oven to 345° F (175° C) and prepare a cast iron skillet or round baking dish.
  2. To create the batter, start by placing the dates, almond butter and vanilla extract into a food processor jar and pulse to obtain a puree.
  3. Next, add the chickpeas, almond flour, oat flour, baking powder and a sprinkle of salt if you like. Process again to obtain a thick, smooth and creamy batter. Stop and scrape down the sides as needed.
  4. Fold in the chocolate chunks using a spoon, then make a quick taste test to see whether any adjustments are necessary.
  5. Add the cookie crust mixture into the prepared skillet and evenly flatten it with the back of a spoon or wetted fingers.
  6. Put the skillet into the oven and bake for 20 minutes or until the center is cooked through. You can check it by inserting a toothpick — if it comes out clean, the cookie cake is done.
  7. Remove from the oven and let cool.

Make the Chocolate Mousse

  1. Drain your soaked and pitted dates well, then place them into a food processor and pulse to obtain a puree.
  2. Add the silken tofu and melted dark chocolate, then process again until a creamy batter forms.
  3. Pour your chickpea liquid or aquafaba into a medium-sized bowl and whip with a hand mixer to obtain a frothy mixture. This may take a few minutes, so don’t worry!
  4. Slowly add your chocolate, date and tofu mixture from the food processor into the fluffy aquafaba and gently whisk to incorporate until you have a homogeneous chocolate mousse. 

Assemble the Chocolate Mousse Cake

  1. Once the chickpea crust has cooled completely, pour the chocolate mousse on top of it. Using the back of a spoon, create an even layer on top of your crust.
  2. Decorate your cake with blackberries, grated chocolate, crushed pistachios and some coarse salt. 
  3. Refrigerate your chocolate mousse cake for 1 hour before cutting it into slices and serving it.

Notes

  • Any leftovers can be stored in the fridge for up to three days.
  • If you have a bit more time, chill the assembled chocolate mousse cake for more than an hour before serving to let it firm up nicely.
  • Get creative with your cake topping by using seasonal berries, chopped nuts or coconut whipped cream!
  • Feel free to add some maple syrup or coconut sugar to the crust and mousse if you’re looking for more sweetness.
  • The chocolate mousse needs to be made with a hand whisk. If you don’t have this appliance, check out other ways of making vegan mousse in the article above.
  • If you don’t have any oat flour or almond flour on hand, you can create it at home! Using whole almonds and rolled oats, put the amount needed (in weight) in your blender or food processor and blend until you end up with flour.
Nutrition Information:
Yield: 12 Serving Size: 1 slice
Amount Per Serving: Calories: 285Total Fat: 13gSaturated Fat: 5gTrans Fat: 0gUnsaturated Fat: 7gCholesterol: 0mgSodium: 154mgCarbohydrates: 38gFiber: 6gSugar: 24gProtein: 7g

Nutrition information is a rough estimate calculated automatically, their accuracy is not guaranteed. Just focus on whole plant-based foods and eat until satiety!

Did you make this recipe?

Please leave a comment on the blog or share a photo on Pinterest

Alena enjoying a bowl of fresh plant-based food and coffe in a restaurant
Alena Schowalter is a Certified Vegan Nutritionist who has been a vegetarian since childhood and vegan since 2012. Together with her husband, she founded nutriciously in 2015 and has been guiding thousands of people through different transition stages towards a healthy plant-based diet. She’s received training in the fields of nutrition, music therapy and social work. Alena enjoys discussions around vegan ethics, walks through nature and creating new recipes.

6 thoughts on “Vegan Chocolate Mousse Cake (High Protein)”

  1. Thanks Alena!! Going to make this in the New Year…got lots of your information and recipes I purchased awhile ago. Looks wonderful…so glad you take the time to do all this for those of us that don’t have the time or NRG!!

    Reply
  2. I made this mousse cake for our family Christmas lunch & it was amazing – even the non-vegetarians loved it! :) Thank you so much!

    Reply

Leave a Comment