Ingredients
Cake Ingredients
- 1 1/2 cups all-purpose flour
- 3 tablespoons cocoa powder
- 1/3 cup sugar (plus 2 tablespoons more for sweeter cake)
- 1 1/2 teaspoons baking powder
- 1/4 teaspoon baking soda
- 1/4 teaspoon salt
- 3 tablespoons oil
- 2 tablespoons non-dairy yogurt
- 1/2 teaspoon vanilla extract (or more to taste)
- 3/4 cup non-dairy milk
- 1/2 cup boiling water
Coffee Syrup
- 1/2 cup coffee (1 use 2 shots of espresso plus enough water to make 1/2 cup)
- 1 tablespoon maple syrup
- 1 tablespoon sugar (optional, for sweeter syrup)
Mocha Chocolate Mousse Layer
- 1/2 cup vegan semi-sweet chocolate
- 1 cup raw cashews (soaked for at least 15 minutes in hot water)
- 15 ounce can full-fat coconut milk
- 2 tablespoons cocoa powder
- 1/4 teaspoon vanilla extract
- 1/3 cup sugar
- 1/4 teaspoon salt
- 1 tablespoon coffee syrup (from above)
Instructions
- Preheat and Prepare Pan: Preheat your oven to 350°F (177°C). Line an 8×8-inch or 9×9-inch brownie pan, a 9-inch cake pan, or two 6-inch tall pans with parchment paper strips that hang over the sides to enable easy cake removal.
- Mix Dry Ingredients: In a large bowl, thoroughly combine the flour, cocoa powder, sugar, baking powder, baking soda, and salt.
- Add Wet Ingredients: Add the oil, non-dairy yogurt, vanilla extract, and non-dairy milk to the dry ingredients. Mix lightly just until combined; avoid overmixing.
- Incorporate Boiling Water: Slowly pour in the boiling water while stirring continuously until you achieve a smooth, slightly flowy batter. If the batter is too thick, add up to one more tablespoon of boiling water cautiously.
- Bake the Cake: Pour the batter evenly into the prepared pan(s) and smooth the top. Bake for 18 to 30 minutes depending on pan size—check doneness by inserting a toothpick; it should come out clean. Smaller pans will bake faster (about 18 minutes), larger pans closer to 28 minutes.
- Cool the Cake: Remove the cake from the oven and cool on the counter for 5 minutes. Then place in the refrigerator to cool completely while you prepare other components.
- Prepare Coffee Syrup: Combine the coffee and maple syrup in a bowl. Add sugar if a sweeter syrup is desired and mix well.
- Melt Chocolate: In a skillet over medium heat, combine the vegan chocolate and 1/4 cup of coconut milk. Stir as the milk heats to melting point. Turn off heat and continue stirring until smooth. Alternatively, melt the chocolate in a microwave in 30-second bursts, stirring well until fully melted.
- Blend Mocha Mousse: In a blender, add soaked cashews, remaining coconut milk, cocoa powder, vanilla, sugar, salt, melted chocolate, and one tablespoon of coffee syrup. Blend for one minute, let sit 5-10 minutes, then blend in intervals until the mixture is very smooth. Refrigerate the mousse for 15 minutes to thicken.
- Adjust Flavor: Taste the mousse; adjust sweetness or flavor with extra cocoa powder, coffee syrup, vanilla, or sugar as desired, blending well after additions.
- Slice and Piercing Cake Layers: Remove the cooled cake from fridge and pan. Using a serrated knife, slice the cake layers in half, then poke holes evenly through layers using a toothpick to allow syrup absorption.
- Assemble Cake Layers: Place one cake layer in the pan sliced-side up. Drizzle generously with coffee syrup. Spread half the mocha chocolate mousse over it. Add the second cake layer on top sliced-side up, press gently to level, drizzle remaining coffee syrup, then top with the remaining mousse. Tap to remove air bubbles and even out the mousse layer.
- Set the Cake: Freeze the cake for up to 2 hours to set the mousse into a firmer texture. Afterwards, store in the refrigerator for up to 3 days. The mousse will hold its texture even after thawed.
- Remove From Pan: When ready to serve, warm a shallow bowl with hot water and place the cake pan standing in it briefly to loosen the cake. Lift cake out using the parchment paper edges.
- Decorate: Smooth the mousses evenly around the cake edges or adhere shaved chocolate to the sides for a decorative finish. Let the cake sit at room temperature for about 15 minutes if totally frozen to soften mousse before slicing.
- Serve and Store: Slice and serve chilled. Store leftovers covered in the fridge for up to 3 days or freeze slices in an airtight container for up to 3 months. Allow frozen cake slices to thaw 10-15 minutes at room temperature before serving.
Notes
- The boiling water is key to developing a moist and tender cake crumb but be cautious not to thin the batter too much.
- Soaking cashews ensures the mousse blends into a creamy, smooth texture.
- The cake pans should be lined with parchment paper extending beyond edges for easy cake removal.
- You can adjust the sweetness of both cake and mousse layers to your preference.
- Using espresso shots in the coffee syrup intensifies mocha flavor but regular brewed coffee works well too.
- The mousse can also be chilled to a spreadable consistency and used as frosting instead of layering and freezing.
- For best results, allow frozen cake to soften slightly before slicing to avoid cracking or crumbling.
- Prep Time: 45 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: Vegan, Contemporary
- Diet: Vegan