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Best Ultimate Homemade Cosmic Brownies Recipe

These homemade Cosmic Brownies deliver a nostalgic, fudgy, chocolate-rich treat inspired by the iconic childhood classic. With a dense brownie base, silky ganache, and colorful candy-coated chocolate chips, this upgraded version outshines store-bought brownies in flavor, texture, and overall cosmic magic.
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Prep Time 20 minutes
Cook Time 33 minutes
Total Time 3 hours 20 minutes
Servings: 16 brownies
Course: Dessert
Cuisine: American
Calories: 385
Ingredients Method Notes

Ingredients
  

  • 1 cup unsalted butter melted
  • 1 cup granulated sugar
  • 1/2 cup packed light brown sugar
  • 4 large eggs room temperature
  • 1 teaspoon vanilla extract
  • 1 cup unsweetened cocoa powder
  • 1 cup all-purpose flour
  • 1/2 teaspoon salt
  • 8 ounces semisweet chocolate chopped
  • 1 cup heavy cream heated
  • 1 cup candy-coated chocolate chips

Method
 

  1. Preheat oven to 350°F (180°C) and line a 9×13-inch baking pan with parchment or foil, leaving an overhang.
  2. Whisk melted butter, granulated sugar, and brown sugar until smooth and glossy.
  3. Add eggs one at a time, mixing well after each addition, then stir in vanilla extract.
  4. Add cocoa powder, flour, and salt, mixing until just combined.
  5. Spread batter into prepared pan and bake 27–33 minutes until a toothpick comes out with moist crumbs.
  6. Place chopped chocolate in a bowl. Pour hot heavy cream over it and let sit 2 minutes, then stir until smooth to form ganache.
  7. When brownies are fully cooled, spread warm ganache evenly on top and immediately add candy-coated chocolate chips.
  8. Refrigerate 1–2 hours until set, then lift out using the overhang and slice into squares.

Notes

For extra fudgy brownies, avoid overbaking—remove them when a toothpick shows moist crumbs. Always cool brownies completely before adding ganache.