Cosmic Brownies

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April 24, 2026

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In this article, we will explore a delicious and easy-to-prepare recipe.

Cosmic Brownies Recipe: A Nostalgic and Delicious Treat

There’s something magical about biting into a soft, fudgy brownie topped with a glossy layer of chocolate frosting and a sprinkle of colorful candies. Cosmic Brownies, inspired by the beloved childhood snack, offer a delightful mix of rich chocolate flavor and playful nostalgia. Whether you’re a brownie aficionado or just looking to recreate a favorite treat, this comprehensive recipe guide will walk you through creating your own Cosmic Brownies from scratch.

Ingredients

Brownie Base

  • ¾ cup all-purpose flour (90 grams) – For a gluten-free version, use a 1:1 gluten-free flour blend.
  • ⅔ cup unsweetened cocoa powder (56 grams)
  • 12 tablespoons unsalted butter (170 grams, melted; equivalent to 1½ sticks) – If using salted butter, omit the kosher salt.
  • 1 cup granulated sugar (200 grams) – Brown sugar can also be used for a deeper flavor.
  • ½ cup brown sugar (107 grams)
  • 2 large eggs (approximately 50 grams each, at room temperature)
  • 1 teaspoon pure vanilla extract (4 grams)
  • ¾ teaspoon kosher salt

Topping

  • 1 cup chocolate chips (170 grams) – Milk, semisweet, or dark chocolate chips all work well.
  • ½ cup heavy cream (114 grams)
  • ¼ cup rainbow candy-coated chocolate chips (43 grams) – Mini M&M’s or rainbow sprinkles can be used as a colorful alternative.

Instructions

Step 1: Prepare Your Baking Pan

  1. Preheat your oven to 325°F (163°C).
  2. Spray a 9×9-inch baking pan with nonstick spray and line it with parchment paper, leaving some overhang for easy removal later.

Step 2: Make the Brownie Batter

  1. In a medium bowl, whisk together the all-purpose flour and cocoa powder until well combined.
  2. In a separate larger bowl, whisk the melted butter with the granulated and brown sugars until the mixture is smooth.
  3. Add the eggs, vanilla extract, and kosher salt to the sugar mixture. Whisk until everything is well incorporated.
  4. Gradually fold the dry ingredients into the wet ingredients, stirring gently until just combined. Avoid overmixing, as this can lead to tough brownies.

Step 3: Bake the Brownies

  1. Pour the brownie batter into the prepared baking pan and spread it evenly with a spatula.
  2. Bake in the preheated oven for 30-35 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
  3. Allow the brownies to cool in the pan.

Step 4: Prepare the Frosting

  1. While the brownies are cooling, heat ½ cup of heavy cream in a small pot over medium heat.
  2. Once the cream is hot, remove it from the heat and add the chocolate chips. Stir until the chocolate is completely melted and the mixture is smooth.

Step 5: Assemble the Cosmic Brownies

  1. Pour the chocolate frosting over the cooled brownies, spreading it evenly with a spatula.
  2. Immediately sprinkle the rainbow candy-coated chocolate chips or your preferred topping over the frosting.

Step 6: Set and Serve

  1. Place the brownies in the refrigerator or freezer to allow the frosting to set.
  2. Once set, lift the brownies from the pan using the parchment paper overhang and slice into squares. For clean cuts, dip a sharp knife in hot water and wipe it dry between slices.

Tips for Success

  • Pan Lining: Don’t skip lining your pan with parchment paper. It ensures easy removal and clean edges.
  • Butter Alternatives: You can substitute butter with a neutral oil like vegetable or canola, but keep in mind that the texture may be slightly different.
  • Storage: Store any leftover brownies in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.

Conclusion

A delicious plate of Cosmic Brownies

Cosmic Brownies are more than just a treat; they’re a culinary experience that combines rich chocolatey goodness with a touch of whimsy. Perfect for parties, potlucks, or just an indulgent snack, these homemade brownies are sure to delight both kids and adults alike. Give this recipe a try and take a nostalgic trip back to the cosmic delights of your childhood!

A delicious plate of Cosmic Brownies

Cosmic Brownies

Indulge in these rich and fudgy cosmic brownies topped with rainbow chips for a delightful treat.
Prep Time 15 minutes
Cook Time 35 minutes
Cooling Time 20 minutes
Total Time 1 hour 10 minutes
Servings: 16 brownies
Course: Dessert
Cuisine: American
Calories: 287

Ingredients
  

Brownies
  • 90 g all-purpose flour for gluten-free use a 1-1 flour
  • 56 g unsweetened cocoa powder
  • 170 g unsalted butter melted
  • 200 g granulated sugar or use brown sugar
  • 107 g brown sugar
  • 2 large eggs room temperature
  • 4 g pure vanilla extract
  • 0.75 tsp kosher salt
  • 170 g chocolate chips milk, semisweet, or dark chocolate chips all work
Frosting
  • 114 ml heavy cream
  • 43 g rainbow candy-coated chocolate chips for topping, use mini M&M’s or rainbow sprinkles instead

Equipment

  • 9×9-inch baking pan

Method
 

  1. Preheat oven to 325°F. Spray a 9×9-inch baking pan with nonstick spray and line it with parchment paper. Set aside.
  2. In a medium bowl, whisk the flour and cocoa powder together.
  3. In a separate larger bowl, whisk the butter and sugars together.
  4. Add in the eggs, vanilla extract, and salt.
  5. Add the flour mixture to the wet ingredients and stir until just combined. Do not overmix the batter; otherwise, your brownies may come out tough.
  6. Pour the batter into the pan, and use a spatula to spread it out.
  7. Bake for 30-35 minutes, or until a toothpick comes out nearly clean. Allow brownies to cool.
  8. While the brownies are baking, place 1/2 cup of heavy cream in a pot and add 1 cup of chocolate chips. Heat, stirring until the chocolate is melted and smooth.
  9. Spread the frosting out over the brownies. Then, sprinkle rainbow chips over the frosting.
  10. Refrigerate or freeze to let the frosting set before enjoying!

Notes

To cut these brownies cleanly, dip a knife in hot water, then wipe it off between slices. You can store them in an airtight container at room temperature for up to 3 days.

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CREATED BY POLLY

Polly is the creator of Adrian Recipes, where she shares easy, family-friendly recipes designed for busy home cooks.

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