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Best Homemade Fudgy Cosmic Brownies (Copycat Recipe)

A close-up, moist slice of cosmic brownies topped with rich chocolate frosting and colorful candy-coated chocolates.

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Make ultra rich, fudgy cosmic brownies from scratch that taste better than the store-bought version. This recipe delivers dense, chewy squares topped with smooth chocolate ganache and colorful candy chips.

Ingredients

Scale
  • 1/2 cup unsalted butter
  • 1 cup granulated sugar
  • 1/2 cup packed brown sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1/2 cup all-purpose flour
  • 1/2 cup unsweetened cocoa powder
  • 1/4 teaspoon salt
  • 1/4 teaspoon baking powder
  • 1/2 cup semi-sweet chocolate chips (for batter)
  • 1 cup powdered sugar (for icing)
  • 1/4 cup unsweetened cocoa powder (for icing)
  • 3 tablespoons milk or heavy cream (for icing)
  • 1/2 teaspoon vanilla extract (for icing)
  • 1/2 cup colorful candy-coated chocolate chips (for topping)

Instructions

  1. Preheat your oven to 350 degrees Fahrenheit. Grease and line an 8×8 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. In a medium saucepan, melt the butter over low heat. Remove from heat and whisk in the granulated sugar and brown sugar until combined.
  3. Whisk in the eggs one at a time until fully incorporated. Stir in the vanilla extract.
  4. In a separate bowl, whisk together the flour, cocoa powder, 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 1/2 cup of semi-sweet chocolate chips.
  6. Pour the batter into the prepared pan and spread evenly.
  7. Bake for 25 to 30 minutes. A toothpick inserted near the center should come out with moist crumbs attached, not wet batter, for a fudgy texture.
  8. Let the brownies cool completely in the pan on a wire rack.
  9. Prepare the chocolate ganache icing: In a small bowl, whisk together the powdered sugar and cocoa powder.
  10. Add the milk and vanilla extract. Whisk until the icing is smooth and thick. If it is too thick, add milk 1 teaspoon at a time. If too thin, add powdered sugar 1 tablespoon at a time.
  11. Spread the chocolate ganache evenly over the cooled brownies.
  12. Immediately sprinkle the colorful candy-coated chocolate chips over the wet icing.
  13. Allow the icing to set for about 30 minutes before lifting the brownies out using the parchment overhang and cutting them into squares.

Notes

  • For the fudgiest texture, slightly underbake the brownies. The residual heat will finish cooking them as they cool.
  • If you prefer a firmer ganache, chill the finished brownies for 15 minutes before slicing.
  • Use high-quality cocoa powder to achieve a deep chocolate flavor in both the base and the icing.

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