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Three chocolate brownies stacked, topped with chocolate frosting and colorful round sprinkles, surrounded by more decorated brownies.
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Copycat Cosmic Brownies (Better than the Original!)

I’ve tested and retested this recipe for Cosmic Brownies until they came out perfectly chewy, fudgy, and full of chocolate flavor. They look just like the classic Little Debbie version, but they taste so much better.
Prep Time15 minutes
Cook Time22 minutes
Cool Time1 hour
Total Time1 hour 37 minutes
Course: Dessert
Cuisine: American
Keyword: Copycat Cosmic Brownies
Servings: 24 servings
Calories: 280kcal
Author: Alicia

Ingredients

For the Brownies:

  • 1 cup melted unsalted butter 2 sticks
  • 1 ¼ cups granulated sugar
  • ¾ cup light brown sugar packed
  • 3 large eggs
  • 3 Tablespoons milk
  • 1 ½ Tablespoons corn syrup
  • 1 Tablespoon vanilla extract
  • 1 cup unsweetened cocoa powder
  • 1 ½ cups all-purpose flour
  • ¾ teaspoon salt

For the Ganache:

  • 1 ½ cups semi-sweet chocolate chips
  • ¾ cup heavy cream
  • 1 Tablespoon unsalted butter

For the Topping:

  • rainbow candy-coated chocolate chips or mini M&Ms or sprinkles as alternatives - use https://amzn.to/4m5UAS2

Instructions

  • Preheat the oven to 350° F. Line a 9 x 13-inch baking pan with parchment paper, leaving a bit of overhang for easy removal.

Make the Batter:

  • In a large bowl, whisk together melted butter, granulated sugar, brown sugar, eggs, milk, corn syrup, and vanilla until smooth.
    1 cup melted unsalted butter, 1 ¼ cups granulated sugar, ¾ cup light brown sugar, 3 large eggs, 3 Tablespoons milk, 1 ½ Tablespoons corn syrup, 1 Tablespoon vanilla extract
  • Add dry ingredients: Stir in cocoa powder, flour, and salt until just combined. Avoid overmixing.
    1 cup unsweetened cocoa powder, 1 ½ cups all-purpose flour, ¾ teaspoon salt

Bake:

  • Spread the batter evenly in the pan. Bake for 22–26 minutes, or until the center is just set and a toothpick comes out with moist crumbs.
  • Cool completely in the pan on a wire rack before adding ganache.

Make Ganache:

  • Heat cream until just steaming, then pour over chocolate chips. Let sit for 2–3 minutes, add butter, then stir until smooth and glossy.
    1 ½ cups semi-sweet chocolate chips, ¾ cup heavy cream, 1 Tablespoon unsalted butter

Top Brownies:

  • Pour ganache over the cooled brownies and spread evenly. Immediately sprinkle with rainbow candy-coated chocolate chips.
    rainbow candy-coated chocolate chips
  • Chill for at least 1 hour to let the ganache set fully before slicing.

Nutrition

Serving: 1serving | Calories: 280kcal | Carbohydrates: 33g | Protein: 3g | Fat: 16g | Saturated Fat: 10g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 0.3g | Cholesterol: 51mg | Sodium: 89mg | Potassium: 157mg | Fiber: 2g | Sugar: 23g | Vitamin A: 399IU | Vitamin C: 0.04mg | Calcium: 32mg | Iron: 2mg