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Cosmic Brownies

These cosmic brownies are rich, fudgy, and topped with smooth chocolate frosting and colorful candy perfect for a nostalgic and delicious homemade treat.
Print Recipe
Prep Time 15 minutes
Cook Time 25 minutes
Inactive Time: 1 hour
Total Time 1 hour 40 minutes
Servings: 16 Brownies
Course: Dessert
Cuisine: American
Ingredients Method Notes

Ingredients
  

For the Brownies
  • 10 tbsp 142g unsalted butter – gives richness and a fudgy texture
  • 1 cup 200g granulated sugar – adds sweetness and structure
  • 1/3 cup 67g light brown sugar – adds moisture and a slight caramel flavor
  • 3/4 cup + 2 tbsp 88g unsweetened cocoa powder, sifted – gives deep chocolate flavor
  • 1/2 tsp vanilla extract – enhances overall taste and aroma
  • 2 large eggs + 1 egg yolk – add richness and help create a dense texture
  • 1 tbsp corn syrup – adds chewiness and a glossy finish
  • 2/3 cup 85g all-purpose flour – provides structure
  • 1 tbsp cornstarch – keeps brownies soft and fudgy
  • 1/4 tsp fine sea salt – balances sweetness
For the Frosting
  • 1/2 cup heavy cream – creates a smooth and rich frosting
  • 1 1/2 cups 255g semisweet chocolate chips – melt into a silky chocolate topping
  • Rainbow candy-coated chocolate chips or mini M&Ms – for topping and decoration

Method
 

  1. Preheat oven to 350°F (180°C). Line an 8×8-inch pan with parchment paper and grease it.
  2. Melt butter in a microwave-safe bowl, then mix in sugars and cocoa powder until smooth.
  3. Let cool slightly, then add vanilla, eggs, egg yolk, and corn syrup. Mix well.
  4. Add flour, cornstarch, and salt, and stir until just combined.
  5. Pour batter into the prepared pan and spread evenly.
  6. Bake for 25 minutes, then let cool completely.
  7. Heat heavy cream, add chocolate chips, and stir until smooth to make the frosting.
  8. Spread frosting over cooled brownies and top with candy.
  9. Refrigerate for 1–2 hours until set, then cut into squares.

Notes

For the best results, allow the brownies to chill fully before serving. This helps the frosting set and gives you that perfect chewy, bakery-style texture.