Cosmic Brownies

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April 24, 2026

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Cosmic Brownies Recipe: A Nostalgic Treat with a Colorful Twist

Nothing transports you back to childhood like a sweet, fudgy brownie, and Cosmic Brownies do just that with their rich chocolate flavor and vibrant candy topping. This homemade version of a beloved classic is easy to make and perfect for sharing. Whether you’re a baking novice or a seasoned pro, these brownies are sure to delight your taste buds and bring a smile to your face. Let’s dive into the recipe and create a batch of these out-of-this-world treats!

Ingredients

For the Brownies:

  • ¾ cup all-purpose flour (90 grams, for gluten-free use a 1-1 flour)
  • ⅔ cup unsweetened cocoa powder (56 grams)
  • 12 tablespoons unsalted butter (170 grams, melted; if using salted butter, omit the kosher salt)
  • 1 cup granulated sugar (200 grams, or use brown sugar for a deeper flavor)
  • ½ cup brown sugar (107 grams)
  • 2 large eggs (50 grams, room temperature)
  • 1 teaspoon pure vanilla extract (4 grams)
  • ¾ teaspoon kosher salt
  • 1 cup chocolate chips (170 grams; milk, semisweet, or dark chocolate chips all work)

For the Frosting and Topping:

  • 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 alternatives)

Instructions

  1. Preheat and Prepare: Preheat your oven to 325°F (163°C). Spray a 9×9-inch baking pan with nonstick spray and line it with parchment paper. This will help you remove the brownies effortlessly once baked.

  2. Mix Dry Ingredients: In a medium bowl, whisk together the flour and cocoa powder to ensure even distribution.

  3. Combine Wet Ingredients: In a larger bowl, whisk the melted butter with both the granulated and brown sugars until the mixture is smooth. Add the eggs, vanilla extract, and kosher salt, whisking until fully incorporated.

  4. Form the Batter: Gradually add the dry mixture to the wet ingredients, stirring gently until just combined. Be careful not to overmix, as this can make the brownies tough.

  5. Bake: Pour the batter into the prepared baking pan, spreading it evenly with a spatula. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out almost clean. Let the brownies cool in the pan.

  6. Prepare the Frosting: While the brownies cool, heat the heavy cream in a pot over medium heat. Add the chocolate chips, stirring until they melt completely and the mixture is smooth.

  7. Frost and Decorate: Pour the chocolate frosting over the cooled brownies, spreading it evenly. Immediately sprinkle the rainbow candy-coated chocolate chips on top for a colorful finish.

  8. Set and Serve: Refrigerate or freeze the brownies to let the frosting set before cutting and serving. For clean, sharp edges, dip a knife in hot water and wipe it dry between cuts.

Tips for Perfect Cosmic Brownies

  • Butter Substitution: You can substitute the butter with a neutral oil like vegetable, canola, or coconut oil, but note that the texture might be slightly different.
  • Parchment Lining: Don’t skip lining your pan with parchment paper. It acts as a sling, making it easy to lift the brownies out without sticking.
  • Cutting Brownies: For those perfectly clean slices, always use a hot, clean knife.

Conclusion

A delicious plate of Cosmic Brownies

These homemade Cosmic Brownies are not just a treat for the taste buds but also a feast for the eyes. With their fudgy base and colorful candy topping, they’re perfect for parties, lunchboxes, or simply a delightful snack. Whether you’re reliving childhood memories or creating new ones, this recipe is sure to become a favorite. Enjoy your cosmic creation!

Cosmic BrowniesCosmic Brownies

A delicious plate of Cosmic Brownies

Cosmic Brownies

Indulge in these rich, chocolatey cosmic brownies that are topped with vibrant candy-coated chocolate chips. A perfect treat for chocolate lovers!
Prep Time 20 minutes
Cook Time 35 minutes
Cooling Time 30 minutes
Total Time 1 hour 15 minutes
Servings: 16 brownies
Course: Dessert
Cuisine: American
Calories: 287

Ingredients
  

Brownie Base
  • 90 g all-purpose flour for gluten-free use a 1-1 flour
  • 56 g unsweetened cocoa powder
  • 170 g unsalted butter melted (1½ sticks), salted works too, if using omit the kosher salt
  • 200 g granulated sugar or use brown sugar
  • 107 g brown sugar
  • 100 g large eggs room temperature
  • 4 g pure vanilla extract
  • ¾ 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
  • Kitchen Scale

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. Stir until just combined.
  5. Add the flour mixture to the wet ingredients and stir until just combined. Do not overmix.
  6. Pour the batter into the pan, and use a spatula to spread it out. Bake for 30-35 minutes, or until a toothpick comes out nearly clean. Allow brownies to cool.
  7. 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.
  8. Spread the frosting out over the brownies. Then, sprinkle rainbow chips over the frosting.
  9. Refrigerate or freeze to let the frosting set before enjoying!

Notes

For a cleaner cut, dip a knife in hot water and wipe it off between slices. You can also substitute the butter with neutral oils like vegetable, canola, or coconut oil for a different texture.

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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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