Why You’ll Love This Recipe

  • Multi-textured delight: dense brownie base, light mousse, smooth ganache
  • Perfect balance: not overly sweet, just right with layered cocoa flavors
  • Impressive yet simple: no need for a mixer—easy to whip up
  • Entertaining-ready: elegant enough for guests, cozy enough for family dinners

ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

  • For the brownie base:
    • unsalted butter, melted
    • granulated sugar
    • large eggs
    • vanilla extract
    • unsweetened cocoa powder
    • all-purpose flour
    • salt
    • baking powder
  • For the chocolate mousse:
    • heavy whipping cream, chilled
    • semisweet chocolate, finely chopped
    • milk
    • powdered sugar
  • For the ganache topping:
    • semisweet chocolate, finely chopped
    • heavy cream

directions

  1. Make the brownie base:
    • Preheat oven to 350 °F (175 °C). Line an 8×8-inch baking pan with parchment, allowing an overhang for easy lifting.
    • In a bowl with a whisk, combine melted butter and sugar. Add eggs and vanilla, stirring until smooth.
    • Sift in cocoa powder, flour, salt, and baking powder; gently fold until just combined.
    • Pour batter into the prepared pan and bake for 20–25 minutes, until the center is set but still moist. Avoid overbaking. Let cool completely in the pan.
  2. Prepare the mousse:
    • Melt the chopped semisweet chocolate with milk using a double boiler or microwave, stirring until silky. Let cool to room temperature.
    • Whip chilled heavy cream with powdered sugar until stiff peaks form.
    • Fold whipped cream into the cooled chocolate mixture gently, preserving airiness.
    • Spread mousse evenly over the cooled brownie layer. Refrigerate for at least 1 hour to set.
  3. Finish with ganache:
    • Combine chopped semisweet chocolate and heavy cream in a heatproof bowl; microwave or use a double boiler until smooth and shiny.
    • Let cool slightly, then pour over the mousse layer, smoothing with an offset spatula.
    • Refrigerate for another 30 minutes until the ganache is firm.
  4. Serve:
    • Use parchment overhangs to lift the set brownies. Slice into squares with a sharp knife—wipe between cuts for clean edges.

Servings and timing

  • Servings: 9 to 12 squares (depending on size)
  • Prep time: 20 minutes for base + 15 minutes for mousse + 10 minutes for ganache
  • Bake time: 20–25 minutes
  • Chill time: ~1½ hours total (1 hour mousse + 30 minutes ganache setting)
  • Total time: About 2½ hours (including chilling)

Variations

  • Dark-chocolate version: Use bittersweet chocolate for mousse and ganache for richer depth.
  • Espresso kick: Add 1–2 tsp instant espresso granules to melted chocolate for a mocha flavor.
  • Nut Butter swirl: Drop spoonfuls of peanut or almond butter onto the brownie batter before baking and swirl lightly.
  • Berry topping: Garnish with fresh raspberries or strawberries before serving for a fruity contrast.
  • Mini servings: Bake in a 9×9 pan and use mini dessert glasses—perfect for parties or portion control.

storage/reheating

  • Refrigerator: Store in an airtight container. Keeps well for 4–5 days; ganache may dull slightly but remains delicious.
  • Freezer: Freeze uncut brownies for up to 3 months. Thaw in fridge before slicing and serving.
  • To serve at room temp: Let sit 15 minutes out of the fridge to soften layers slightly. Avoid microwave reheating to preserve texture.

FAQs

What type of chocolate works best?

Use good-quality semisweet or bittersweet chocolate (60–70% cocoa) for mousse and ganache to achieve creamy richness and proper structure.

Can I skip the mousse and go straight to ganache?

Yes, for a simpler brownie, skip the mousse and pour ganache directly over the cooled brownie. But the mousse adds lovely lightness.

How do I get clean layers?

Cool each layer completely before adding the next. Chill between steps to set everything neatly.

Can I make this ahead of time?

Absolutely! Prepare up to the ganache layer a day ahead. Leave ganache overlay for last 30 minutes before serving.

Can I use whipping cream instead of heavy whipping cream?

Heavy whipping cream (36% fat) provides structure. Whipping cream (30% fat) may work but results could be softer.

Why did my ganache get grainy?

Overheating chocolate or adding cold cream can cause texture issues. Warm ingredients gently and stir until smooth.

How do I cut neat squares?

Use a hot, sharp knife (dip in hot water and dry between cuts) for clean edges and less mess.

Are these suitable for parties?

Yes—cut into small bites or serve in individual glasses; garnish with berries or edible gold for a fancy touch.

Can I add nuts?

Yes! Sprinkle chopped toasted nuts (like pecans or hazelnuts) over ganache before it sets for crunch.

Do I need to use parchment?

It helps lift brownies from the pan easily and cuts cleanly but isn’t essential—just grease the pan well if skipping it.

Conclusion

Chocolate Mousse Brownies combine fudgy richness, creamy mousse, and silky ganache for an over‑the‑top chocolate experience. Ideal for celebrations or indulgent treats, this layered dessert strikes a perfect balance of texture and flavor. Prep ahead, serve with a warm drink or berries, and enjoy every heavenly bite!

Print
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Easy Chocolate Mousse Brownies

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Decadent brownies topped with a velvety chocolate mousse layer and finished with a glossy ganache for a show-stopping, triple-chocolate dessert.

  • Total Time: 2 hours 30 minutes (including chilling)
  • Yield: 9 to 12 brownies

Ingredients

For the brownie base:

1/2 cup unsalted butter, melted

1 cup granulated sugar

2 large eggs

1 tsp vanilla extract

1/3 cup unsweetened cocoa powder

1/2 cup all-purpose flour

1/4 tsp salt

1/4 tsp baking powder

For the chocolate mousse:

1 cup heavy whipping cream, chilled

4 oz semisweet chocolate, finely chopped

2 tbsp milk

2 tbsp powdered sugar

For the ganache topping:

4 oz semisweet chocolate, finely chopped

1/2 cup heavy cream

Instructions

  1. Make the brownie base: Preheat oven to 350 °F (175 °C). Line an 8×8-inch pan with parchment. In a bowl, whisk melted butter and sugar. Stir in eggs and vanilla. Sift in cocoa powder, flour, salt, and baking powder; fold gently. Pour into pan and bake for 20–25 minutes until center is just set. Cool completely.
  2. Prepare the mousse: Melt chopped chocolate with milk in a double boiler or microwave until smooth. Cool to room temp. Whip chilled cream and powdered sugar to stiff peaks. Gently fold whipped cream into cooled chocolate. Spread mousse evenly over brownie base. Chill for 1 hour.
  3. Finish with ganache: Heat heavy cream and pour over chopped chocolate. Let sit 1–2 minutes, then stir until glossy and smooth. Cool slightly and pour over mousse. Smooth top and refrigerate for 30 minutes until set.
  4. Serve: Use parchment overhang to lift brownies out. Slice into squares with a hot, sharp knife for clean edges.

Notes

Use parchment paper for easy removal and neat slices.

Let each layer cool/set before adding the next for clean definition.

Add espresso powder or swirl nut butter into brownie layer for variations.

Top ganache with nuts or fresh berries if desired.

Chill before slicing and wipe knife between cuts for best presentation.

  • Author: Madelynn
  • Prep Time: 45 minutes
  • Cook Time: 25 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Nutrition

  • Serving Size: 1 brownie (1 of 12)
  • Calories: 340
  • Sugar: 25g
  • Sodium: 90mg
  • Fat: 23g
  • Saturated Fat: 14g
  • Unsaturated Fat: 8g
  • Trans Fat: 0g
  • Carbohydrates: 32g
  • Fiber: 2g
  • Protein: 4g
  • Cholesterol: 80mg

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