If you love chocolate desserts, this one is going to be a favorite. It has a soft chocolate cake on the bottom and a smooth, rich mousse layer on top.

The best part is that it’s completely dairy free. I use oat milk, coconut cream, and dairy free chocolate to get that creamy texture without any real cream or butter.

I know making a layered cake can sound like a lot of work, but this one is actually simple. The cake bakes in one pan, and the mousse comes together with just a few steps.

The hot coffee in the batter is a small trick I like to use. It doesn’t make the cake taste like coffee, it just makes the chocolate flavor deeper.

Give it a few hours in the fridge to set, and you’ll have a dessert that looks fancy but is easy to pull off at home.

Why This Recipe Is a Keeper

Deep Chocolate Flavor – Cocoa, semisweet chocolate, and coffee create a rich, layered chocolate taste without tasting like coffee.

Two Dreamy Textures – Moist chocolate cake and airy mousse make every chilled bite feel creamy, soft, and satisfying.

Completely Dairy Free – Oat milk, coconut cream, and dairy-free chocolate deliver classic indulgence without any dairy ingredients.

Perfectly Balanced Sweetness – Semisweet chocolate, cocoa, coffee, and salt keep the cake flavorful without becoming overly sweet.

Here’s What You’ll Need

For the Chocolate Cake

1 cup All-Purpose Flour
3/4 cup Granulated Sugar
1/3 cup Unsweetened Cocoa Powder
3/4 tsp Baking Soda
1/2 tsp Fine Salt
1 Large Egg
1/2 cup Oat Milk
1/4 cup Neutral Oil
1 tsp Pure Vanilla Extract
1/2 cup Hot Coffee

For the Chocolate Mousse

1 tbsp Cold Water
1 tsp Unflavored Gelatin
8 oz Dairy-Free Semisweet Chocolate, Chopped
1/2 cup Full-Fat Coconut Cream
1 cup Dairy-Free Whipping Cream, Cold
2 tbsp Powdered Sugar
1 tsp Pure Vanilla Extract
1/8 tsp Fine Salt

How to Make It

Step 1

Preheat the oven to 350 F. Grease an 8-inch springform pan and line the bottom with parchment paper.

Step 2

Whisk the flour, sugar, cocoa powder, baking soda, and salt together. Add the egg, oat milk, oil, and vanilla, then whisk in the hot coffee until the thin batter is smooth.

Step 3

Pour the batter into the pan and bake for 24 to 28 minutes, until the center springs back when lightly pressed. Cool the cake completely in the pan.

Step 4

Sprinkle the gelatin over the cold water and let it bloom for 5 minutes. Meanwhile, place the dairy-free chocolate in a heat-safe bowl.

Step 5

Heat the coconut cream until steaming, then stir in the bloomed gelatin until dissolved. Pour the mixture over the chocolate, wait 2 minutes, and stir until glossy and smooth.

Step 6

Whip the dairy-free whipping cream, powdered sugar, vanilla, and salt to medium peaks. Once the chocolate mixture is barely warm, fold in one-third of the whipped cream, followed by the remainder.

Step 7

Spread the mousse evenly over the cooled cake. Refrigerate for at least 6 hours, then release the springform pan and serve the cake chilled.

Recipe Tips

Measure the Flour and Cocoa Carefully

For the softest cake, spoon the flour into the measuring cup and level the top. Scooping directly from the bag can pack in too much flour and make the cake dense.

Cocoa powder often has small lumps, so pass it through a fine sieve before mixing it with the other dry ingredients. This helps the thin batter become completely smooth.

Use Hot Coffee for a Richer Cake

The coffee should be hot enough to help bring out the cocoa flavor, but it does not need to be boiling. Freshly brewed coffee that has rested for about 1 minute works well.

Pour it in gradually while whisking so the egg mixture warms evenly. The finished batter will look much thinner than most cake batters, which is exactly the consistency you want.

Check the Cake Before the Timer Ends

Start checking the cake at 24 minutes because an 8-inch cake can bake quickly. The center should spring back gently, and a tester should come out with a few moist crumbs rather than wet batter.

Let the cake cool completely inside the springform pan before adding the mousse. Even a little warmth can soften the mousse and keep the layers from setting neatly.

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