Chocolate Mousse Cake ~ Almond Sponge Cake
Prep time
Bake time
Total time
I use 7" cake pans for most of my layer cakes, but this recipe listed below will convert easily to 2-8" cake layers with no changes to the recipes.
The time listed for this cake project is a rough estimate. Since I do these Building on Recipes Projects I make some of the recipes in advance, like the almond sponge cake I made 3 days ahead and kept it in the refrigerator wrapped until I built the cake.
The buttercream can be made up to 1 week ahead and then re-whipped upon using.
The ganache can also be made up to 1 week ahead.
Serves: Serves 10 people
  • For the Almond Sponge Cake
  • Vegan Butter 1 cup (226g)
  • Granulated Sugar 2 cups (400g)
  • Golden Flax Meal 3 Tablespoons (24g)
  • Hot Water 6 Tablespoons (90ml)
  • Vanilla Vegan Yogurt *any brand ½ cup (150g)
  • Plant Milk *I am using soy milk 1 cup (237ml)
  • Vanilla Extract 2 teaspoons (10ml)
  • All Purpose Flour 3 cups (375g)
  • Baking Powder 1 teaspoon (6g)
  • Baking Soda (6g)
  • Salt ½ teaspoon (3g)
  • Raw Unsalted Almonds 1½ cups (225g) *See notes section!
  • For the Chocolate Mousse
  • Semi Sweet Vegan Chocolate 8ounces (226g)
  • Hot brewed coffee 2 Tablespoons (30ml)
  • Vanilla Extract 1 teaspoon (5ml)
  • Aquafaba *Chickpea Water from Canned Chickpeas ¼ cup (60ml)
  • Agar powder ⅛ teaspoon *see note above
  • Granulated Sugar 4 Tablespoons (50g)
  • Cream Of Tartar ¼ teaspoon
  • Coconut Milk Full Fat 1- 15ounce can (*refrigerated overnight)
  • For the Amaretto Chocolate Ganache
  • Semi Sweet Vegan Chocolate 4 ounces (113g)
  • Plant Milk * I prefer to use soy milk 6 Tablespoons (90ml)
  • Amaretto 2 Tablespoons *optional- if not using replace with more plant milk
  • For the Simple Syrup *While I did not use this in the video when building the cake, I think it would be a nice addition that is why I am adding it here. It is completely optional though!
  • ½ cup water
  • ½ sugar
  • 2 Tbs Amaretto *optional
  • 1 Recipe Swiss Meringue Buttercream
  1. For the Cake Batter Be sure all your ingredients are at room temperature before beginning.
  2. First prepare your cake pans with professional bakery pan grease and parchment paper lining.
  3. Preheat the oven to 350°F
  4. Combine the flax meal & hot water together in a small bowl and set aside to thicken for about 5 minutes.
  5. Grind the almonds in a food processor or chop as fine as possible by hand with a knife, set aside
  6. Combine the plant milk & yogurt with the vanilla and set aside.
  7. Sift the flour with the salt, baking powder & baking soda
  8. In a large mixing bowl, cream the vegan butter and sugar on medium to high speed until light & fluffy, this may take 3-5 minutes.
  9. Scrape the bottom & sides of the bowl from time to time to ensure an even mix.
  10. Add the flax paste to the creamed mixture and then whip on high for 20 seconds to emulsify
  11. Turn the speed back down to low and add ⅓ of the sifted dry ingredients and mix just until it is combined
  12. Add half of the plant milk/yogurt mixture and mix just until combined
  13. Repeat with another ⅓ of the dry ingredients, the other half of the plant milk and then the last of the dry ingredients.
  14. add the finely ground almonds and mix well
  15. Portion the batter into your prepared pans and bake in the preheated 350°F oven for 25 minutes.
  16. Turn the oven temperature down to 300° and bake for another 15-20 minutes or when a toothpick inserted into the center comes out clean, no raw cake batter.
  17. *I turn the oven temp down half way through because this is a very thick cake layer I do not want it to over brown on the outside & edges while the inside batter cooks
  18. Cool the cakes in the pans until they are cool to the touch, then flip them out onto a wire rack to cool the rest of the way
  19. Be sure to remove the parchment paper lining.
  20. Prepare the buttercream recipe of your choice and set it aside
  21. Prepare the Chocolate Ganache by chopping the chocolate to same sized small pieces and place in a medium mixing bowl.
  22. In a small sauce pot heat the plant milk to just below a boil then pour it over the chocolate in the bowl, add the Amaretto *if using and whisk everything smooth to melt.
  23. Allow to set at room temperature *or speed it up in the refrigerator to make the truffles
  24. The truffles are simply scoops of set ganache rolled into chopped almonds
  25. Prepare the Chocolate Mousse
  26. Combine the hot coffee and the agar powder and whisk smooth. Keep it warm or the agar will set and you will have to remelt.
  27. Meanwhile open the can of coconut milk that has been refrigerated overnight and carefully scoop out the fat that is on top and place in a mixer with a whip attachment
  28. Whip the coconut cream to soft peaks and reserve in the refrigerator
  29. Melt the chocolate in a large bowl over a double boiler or in a microwave safe bowl
  30. Add the hot brewed coffee with the agar and the vanilla extract to the melted chocolate all at once while whisking vigorously to incorporate well.
  31. Cool the chocolate mixture to about 80°F or tepid to the touch or your whipped coconut cream will melt back to liquid.
  32. Add the reserved whipped coconut cream and whisk smooth
  33. Whip the aquafaba/agar with the cream of tartar to stiff peaks while adding the sugar very slowly
  34. Take a small portion of the AF meringue and fold into the chocolate mixture to lighten.
  35. Fold in the rest of the AF gently
  36. At this point you can allow the mousse to set in the refrigerator to a scoop-able consistency to build the cake, or set the cake up in a ring mold and pour the freshly made mousse into the mold with the layers and allow everything to set together. *as you will see in the video how I did that
  37. Once the mousse is set proceed to assemble and ice the cake as shown in the video tutorial
I used ground almonds for this cake recipe, but if you are using almond flour reduce the amount of all purpose flour in this recipe by ½ cup

Chocolate Mousse Cake ~ Almond Sponge Cake must be kept refrigerated but can be kept at room temperature for an hour before serving.

Store for up to 1 week wrapped loosely to prevent drying
Recipe by Gretchen's Vegan Bakery at