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Brownies with Buttercream Frosting

Easy Buttercream Brownies Recipe

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5 from 2 reviews

  • Author: Nicole Washington
  • Total Time: 45 mins
  • Yield: 9 1x


Indulge in the ultimate dessert with our Brownies with Buttercream Frosting recipe. Learn how to create these fudgy brownies topped with dreamy buttercream frosting. Perfect for any occasion. Dive into the world of sweet delights!




  • ½ cups Unsalted Butter, Room Temperature
  • 10 ounces, weight Semi-sweet Chocolate, Chopped
  • 1½ cup Sugar
  • 4 Eggs
  • 1 teaspoon Vanilla Extract
  • ¾ cups Flour
  • ½ teaspoons Salt
  • ¼ cups Hot Fudge Sauce, More For Drizzle


  • 1½ stick Unsalted Butter, Room Temperature
  • 4 cups Powdered Sugar
  • ½ teaspoons Salt
  • 1 teaspoon Vanilla Extract
  • 2 Tablespoons Milk
  • ⅛ cups Rainbow Sprinkles (optional)


  1. For the brownies: Preheat oven to 350 F.
  2. Using a double boiler or small saucepan, melt the butter over medium heat. After the butter has melted, quickly add the chocolate and take the pan off the heat. Use a spoon and stir until completely melted and allow to cool to room temperature.
  3. Next, use a separate bowl to beat the sugar and eggs, adding eggs one at a time. Add the vanilla, flour, and salt. Finally, pour in the melted chocolate mixture and the hot fudge sauce and beat until well incorporated.
  4. Prepare an 8X8 square cake pan by layering the pan with parchment paper and spraying the parchment paper with baking spray or butter. Pour the brownie mixture into the pan and bake for 25-30 minutes. Using a toothpick, stick the brownies in the middle to determine if they are done.
  5. After the brownies are finished baking remove them from the oven and allow them to cool at room temperature. Next, place them in the refrigerator to be chilled. Chill for 1 hour.
  6. For the buttercream: In a medium bowl, beat the butter and begin to add the powdered sugar. The frosting will become slightly thick with big crumbs. Add the salt, vanilla extract and milk.
  7. After the brownies are chilled, take the buttercream frosting and frost the top of the brownies using all of the buttercreams. To garnish the brownies, drizzle with chocolate fudge and/or sprinkle with sprinkles.
  • Prep Time: 15 mins
  • Cook Time: 30 mins
  • Category: Dessert
  • Method: Bake
  • Cuisine: American