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Fudgy Copycat Cosmic Brownies

A rich, fudgy slice of cosmic brownies topped with glossy chocolate frosting and colorful candy sprinkles.

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Bake ultra-rich, fudgy, and chewy homemade Cosmic Brownies that taste better than the store-bought version, topped with a simple chocolate ganache and colorful sprinkles.

Ingredients

Scale
  • 1 cup (2 sticks) unsalted butter, melted
  • 2 cups granulated sugar
  • 1 cup packed light brown sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup unsweetened cocoa powder
  • 1 cup all-purpose flour
  • 1 teaspoon salt
  • 1/2 teaspoon baking powder
  • 1/2 cup semi-sweet chocolate chips (for brownie batter)
  • 1/2 cup (1 stick) unsalted butter (for frosting)
  • 1/2 cup unsweetened cocoa powder (for frosting)
  • 3 cups powdered sugar
  • 1/4 cup milk
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon salt
  • 1/2 cup rainbow candy-coated sprinkles (for topping)

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, granulated sugar, and brown sugar until 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 until just combined. Do not overmix. Fold in the chocolate chips.
  6. Spread the batter evenly into the prepared baking pan.
  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 frosting: In a medium saucepan over low heat, melt the 1/2 cup butter. Whisk in the 1/2 cup cocoa powder until smooth. Remove from heat.
  10. Whisk in the powdered sugar, milk, vanilla extract, and salt until the frosting is smooth and spreadable. If it is too thick, add milk a teaspoon at a time.
  11. Once the brownies are completely cool, spread the chocolate ganache evenly over the top.
  12. Immediately sprinkle the rainbow candies over the frosting before it sets.
  13. Let the frosting set for about 30 minutes before cutting into squares.

Notes

  • For the fudgiest texture, slightly underbake the brownies; the center should still look slightly soft when you remove them.
  • If you are planning your weekly meals, these freeze well for later enjoyment, similar to using meal planning strategies.
  • You can use a sous-vide precision cooker to temper chocolate for a shinier ganache, though it is not necessary for this simple topping.

Nutrition

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