I love this chocolate mousse for cake (no gelatin or eggs)

Ingredients

• 200 g Dark Chocolate (70‑72% cacao) (chopped into 1‑2 cm pieces; use Trader Joe’s or similar)
• 30 g Unsalted Butter (cut into small cubes)
• 1 pinch Pinch of Salt (enhances chocolate flavor)
• 500 ml Heavy Whipping Cream (cold, 36% fat; divided 300 ml for mousse, 200 ml for outer frosting)
• 120 g Full‑Fat Sour Cream (adds richness and slight tang to mousse)
• 30 g Powdered Sugar (for sweetening the outer whipped cream)
• 0.25 tsp Azana Stiff (modified corn starch stabilizer) (adds stability to whipped cream without flavor; use only a quarter‑teaspoon)
• 4 pieces 8‑inch Chocolate Chiffon Cake Rounds (pre‑baked, sliced horizontally into thin layers)
• 5 leaves Fresh Mint Leaves (optional garnish) (adds fresh aroma; substitute thyme if unavailable)

Instructions

1. Prepare Chocolate Base

   Chop the dark chocolate into roughly 1‑2 cm pieces and place them in a microwave‑safe bowl with the butter and a pinch of salt.

   Time: PT5M

2. Melt Chocolate and Butter

   Microwave on high for 20‑second intervals, stirring between each, until the mixture is glossy and fully melted (about 40 seconds total).

   Time: PT2M

   Temperature: High power microwave

3. Chill Whipping Bowl

   Place a separate mixing bowl and the whisk attachment in the freezer for about 5 minutes.

   Time: PT5M

4. Whip Cream for Mousse

   Remove the chilled bowl, add 300 ml heavy whipping cream and whip on medium speed until soft peaks form.

   Time: PT5M

5. Combine Chocolate with Whipped Cream

   Re‑warm the melted chocolate for 10‑second bursts until it is still warm but not hot, then slowly fold it into the whipped cream until fully incorporated, creating a smooth mousse base.

   Time: PT5M

   Temperature: Warm (≈40‑45°C)

6. Add Sour Cream

   Stir in the full‑fat sour cream until the mousse is uniform and slightly glossy.

   Time: PT2M

7. Chill Mousse Briefly

   Transfer the mousse to a clean bowl, cover, and refrigerate for about 5 minutes to firm slightly for easier handling.

   Time: PT5M

   Temperature: Refrigerator (4°C)

8. Slice Cake Layers

   Using a long serrated knife, slice each 8‑inch chiffon cake round horizontally into two thin layers, yielding four layers total.

   Time: PT5M

9. Assemble Cake with Mousse

   Place the first cake layer on a turntable, spread ~¼ cup of mousse evenly with a spatula, then top with the next layer. Repeat until all four layers are stacked with mousse between each.

   Time: PT10M

10. Chill Assembled Cake

    Cover the assembled cake and refrigerate for at least 30 minutes to let the mousse set fully.

    Time: PT30M

    Temperature: Refrigerator (4°C)

11. Whip Outer Cream

    Remove the chilled bowl, add the remaining 200 ml heavy cream, a pinch of sugar, and the measured ¼ tsp Azana Stiff. Whip on low speed until thick, then increase to medium until soft peaks form.

    Time: PT7M

12. Apply Crumb Coat

    Spread a thin layer of whipped cream over the entire cake to lock in crumbs. Chill for 10 minutes.

    Time: PT10M

    Temperature: Refrigerator (4°C)

13. Final Frosting

    Using a bench scraper and spatula, apply a generous layer of whipped cream over the sides and top, smoothing with the acrylic disc for a flawless finish. Patch any holes or gaps as needed.

    Time: PT12M

14. Garnish (Optional)

    Scatter fresh mint leaves (or thyme) over the top for aroma and visual appeal.

    Time: PT2M

Nutrition Facts

Calories

350

Protein

4 g

Carbohydrates

30 g

Fat

22 g

Fiber

3 g

Ingredient Substitutions

• Instead of Dark Chocolate (70‑72% cacao): Milk chocolate for a sweeter mousse, 70% dark chocolate
• Instead of Unsalted Butter: Margarine (use a neutral‑flavored one)
• Instead of Pinch of Salt: Sea salt
• Instead of Heavy Whipping Cream: Cold full‑fat whipping cream
• Instead of Full‑Fat Sour Cream: Greek yogurt (full‑fat)
• Instead of Powdered Sugar: Granulated sugar (processed in blender)
• Instead of Azana Stiff (modified corn starch stabilizer): Standard cornstarch (requires heating), Gelatin (1 g)
• Instead of 8‑inch Chocolate Chiffon Cake Rounds: Store‑bought chocolate sponge cake
• Instead of Fresh Mint Leaves (optional garnish): Fresh thyme

Equipment Needed

• Microwave‑Safe Bowl
• Stand Mixer or Hand Mixer with Whisk Attachment
• Freezer‑Safe Mixing Bowl
• Spatula (silicone)
• Bench Scraper
• Cake Turntable
• Piping Bag (optional) (optional)
• Scoops (3‑Tbsp)
• Acrylic Disc (for smoothing) (optional)
• Refrigerator

Critical Steps — Do Not Skip

• Melting chocolate without scorching
• Folding warm chocolate into whipped cream to keep mousse airy
• Chilling mousse just enough to be spreadable
• Stabilizing the outer whipped cream with Azana Stiff
• Applying a crumb coat before the final frosting

Chef Tips from the Video

• Use a kitchen scale for all chocolate, butter, and sugar for consistency.
• A pinch of salt in the chocolate base intensifies flavor without making it salty.

Troubleshooting

Storage

Refrigerator: Store cake in an airtight container for up to 3 days.

Freezer: Wrap tightly in plastic wrap and foil; freeze up to 1 month. Thaw in refrigerator before serving.

Room temperature: Do not leave at room temperature for more than 2 hours.

Make-Ahead Tips

• The chocolate mousse can be prepared up to 24 hours ahead and kept refrigerated.
• Whipped‑cream frosting is best used the same day but can be stabilized for up to 6 hours.

Frequently Asked Questions