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The Best Homemade Fudgy Cosmic Brownies (Copycat Recipe)

A moist, dark chocolate slice of cosmic brownies topped with fudge frosting and colorful candy pieces.
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Make ultra-fudgy, dense, and chewy brownies that taste better than the store-bought version. This recipe includes the signature chocolate ganache frosting and colorful candy chip topping for the ultimate nostalgic chocolate indulgence.

Ingredients

Scale
  • 1 cup (2 sticks) unsalted butter, melted
  • 2 cups granulated sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 3/4 cup unsweetened cocoa powder
  • 1 cup all-purpose flour
  • 1/2 teaspoon salt
  • 1/2 teaspoon baking powder
  • 1 cup semi-sweet chocolate chips (for batter)
  • 1 cup powdered sugar (for frosting)
  • 1/4 cup unsweetened cocoa powder (for frosting)
  • 3 tablespoons milk or heavy cream (for frosting)
  • 1 teaspoon vanilla extract (for frosting)
  • 1/2 cup colorful candy chip topping (like M&M’s Minis or similar)

Instructions

  1. Preheat your oven to 350°F (175°C). Grease and line a 9×13 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. In a large bowl, whisk together the melted butter and granulated sugar until just combined.
  3. Beat in the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
  4. In a separate bowl, whisk together the cocoa powder, flour, salt, and baking powder.
  5. Gradually add the dry ingredients to the wet ingredients, mixing only until just combined. Do not overmix. Fold in the chocolate chips for the batter.
  6. Spread the batter evenly into the prepared pan.
  7. Bake for 25 to 30 minutes. A toothpick inserted near the center should come out with moist crumbs attached, not wet batter. This keeps them fudgy.
  8. Let the brownies cool completely in the pan on a wire rack. This step is key for a clean cut and proper frosting adhesion.
  9. Prepare the chocolate ganache frosting: In a medium bowl, whisk together the powdered sugar and cocoa powder.
  10. Add the milk and vanilla extract. Whisk until the frosting is smooth and thick. If it is too thick, add milk half a teaspoon at a time.
  11. Spread the chocolate ganache frosting evenly over the cooled brownies.
  12. Immediately sprinkle the colorful candy chip topping over the wet frosting.
  13. Let the frosting set for at least 30 minutes before cutting into squares.

Notes

  • For the fudgiest texture, use high-quality cocoa powder. This is where the deep chocolate flavor comes from.
  • Do not overbake your brownies. They should look slightly underdone when you pull them out; carryover cooking finishes them as they cool.
  • If you want a thicker, chewier brownie, use an 8×8 inch pan instead, but reduce the baking time slightly and check often.

Nutrition

Find it online: https://kitchenslang.com/best-homemade-fudgy-cosmic-brownies/