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Cosmic Brownies Recipe A fresh batch of brownies topped with shiny chocolate ganache and colorful candy-coated chocolates.

Cosmic Brownies

These indulgent Cosmic Brownies feature a rich chocolate fudge base topped with creamy ganache and colorful rainbow sprinkles perfect for kids and adults alike!
5 from 1 vote
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Course: Dessert
Cuisine: American
Keyword: chocolate brownies, cosmic brownies, fudge brownies, rainbow sprinkles
Prep Time: 20 minutes
Cook Time: 30 minutes
Cooling Time: 2 hours
Total Time: 2 hours 50 minutes
Servings: 9
Calories: 523kcal
Cost: Low

Ingredients

For the Fudge Brownies:

  • ½ cup unsalted butter melted
  • ¾ cup granulated sugar
  • ½ cup packed light brown sugar
  • 2 large eggs room temperature
  • 1 tablespoon neutral oil such as vegetable oil
  • 2 teaspoon pure vanilla extract
  • ¾ cup all-purpose flour
  • ½ cup cocoa powder unsweetened
  • ¼ teaspoon baking soda optional
  • ½ teaspoon kosher salt

For the Frosting:

  • ½ cup heavy whipping cream
  • 4 oz semisweet chocolate chopped
  • 4 oz milk chocolate chopped
  • 1 tablespoon salted butter
  • ½ cup rainbow chocolate chip sprinkles

Instructions

  • Preheat the oven to 350°F (175°C). Grease an 8×8-inch nonstick baking pan and line it with parchment paper, leaving at least 2 inches hanging over the edges.
  • In a medium-sized bowl, beat the melted butter, granulated sugar, and brown sugar with a hand mixer on medium speed.
  • Add eggs one at a time, mixing well after each addition.
    Egg being added to the wet ingredients mixture for the brownie batter."
  • Stir in the oil and vanilla extract.
  • In a separate bowl, whisk together the flour, cocoa powder, baking soda (if using), and salt. Slowly add the dry ingredients to the wet mixture while mixing at a low speed until fully incorporated.
    Dry ingredients like flour and cocoa powder mixed in a glass bowl.
  • Pour the brownie batter into the prepared pan and spread evenly. Bake for 30 minutes or until a toothpick inserted into the center comes out just barely clean.
    Pouring rich brownie batter into a lined square baking dish.
  • Allow the brownies to cool in the pan for about an hour or until they are close to room temperature.
  • Place the heavy cream in a microwave-safe bowl. Heat in 15-second increments until hot, stirring in between.
  • Add the chopped semisweet and milk chocolates to the hot cream and let sit for a minute. Whisk until smooth.
  • Stir in the salted butter until completely melted and incorporated.
    Melted chocolate and butter being whisked together in a bowl.
  • Pour the ganache over the cooled brownies. Use a spatula to spread it evenly. Let sit for 5 minutes to set.
  • Sprinkle the rainbow chocolate chip sprinkles evenly over the ganache.
  • Cover the brownies and refrigerate for about 1 hour or until the frosting is set. Use the parchment paper to lift the brownies out of the pan and cut into squares.

Notes

Store these Cosmic Brownies in the fridge for a cool treat that lasts up to 5 days. Perfect for making ahead and packing for lunches!

Nutrition

Serving: 1brownie | Calories: 523kcal (26%) | Carbohydrates: 61g (20%) | Protein: 5g (10%) | Fat: 31g (48%) | Saturated Fat: 18g (113%) | Polyunsaturated Fat: 2g | Monounsaturated Fat: 8g | Trans Fat: 1g | Cholesterol: 84mg (28%) | Sodium: 203mg (9%) | Potassium: 239mg (7%) | Fiber: 4g (17%) | Sugar: 47g (52%) | Vitamin A: 630IU (13%) | Vitamin C: 0.1mg | Calcium: 58mg (6%) | Iron: 3mg (17%)
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