Chocolate Mousse Brownies

As a food blogger, I don’t repeat recipes very often. I’ve made these Chocolate Mousse Brownies twice in the last month. Once for my family and once for a crowd of hungry teenagers. They were a big hit with both groups, and for good reason. They are amazing!

The dense, chewy brownies and light, fluffy chocolate mousse are both fantastic on their own, but together they equal decadent brownie perfection. And believe it or not, they are really easy to make. The biggest challenge is not eating all the mousse before you put it on the brownies!

Chocolate Mousse Brownies

Chocolate Mousse Brownies
Prep time
Cook time
Total time
Serves: 10-12
For the brownies:
  • 3/4 cup flour
  • 1/2 cup cocoa
  • 1/2 teaspoon salt
  • 3/4 cup butter
  • 1 1/2 cups sugar
  • 1 teaspoon vanilla
  • 2 eggs
For the mousse:
  • 3/4 cups miniature marshmallows
  • 4 ounces chopped semi-sweet chocolate
  • 1/4 cup milk
  • 1 cup heavy whipping cream
  • Additional chocolate for garnish (optional)
  1. Preheat oven to 350 degrees. Grease a 9-inch square baking pan.
  2. In a large bowl, combine flour, cocoa, and salt.
  3. Melt butter in a large saucepan and remove from heat. Stir in sugar and vanilla. Quickly whisk in eggs, one at a time.
  4. Add butter mixture to flour mixture and stir until well blended. Spread brownie batter into prepared pan and bake for 25-30 minutes. Cool completely.
  5. Meanwhile, make the mousse by heating marshmallows, chocolate and milk in a medium saucepan over medium-low heat, stirring often until completely smooth. Cool completely.
  6. With an electric mixer, beat whipping cream until stiff peaks form. Stir in cooled chocolate mixture.
  7. Spread mousse evenly over cooled brownies. Drizzle with additional melted chocolate, or top with chocolate shavings, if desired.
  8. Refrigerate brownies for at least 30 minutes, or until ready to serve. Keep leftover brownies in the refrigerator (this will also make the brownie layer dense and chewy!).

Who Dished It Up First:
This is an original recipe.

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  1. I’m loving this brownie! I need to make them this weekend for sure! I’ve already written down the ingredients… and I’m heading to the store right after work! Ok, I said this weekend…but I have a feeling that it’s going to happen much sooner. Like maybe tonight sooner!
    Wonderful post. :-)

  2. I first glanced at the recipe and you captured my attention with making them twice. I’m the same way, my husband often asks if we can have something more than once. Pinning these to try.

  3. Beautiful recipe. I have a question. Can you use cool whip instead of the whipped cream? And how long can you refridgerate them or freeze them?

  4. These are very good. I made them to take to a potluck and they were a big hit with everyone–will definitely be a repeat for us.