Hajar Larbah

Cosmic Brownies

5 from 4 votes

Prep Time
20 mins
Cook Time
20 mins
Total Time
40 mins
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Cosmic Brownies

The best treat to have as a kid and yes, adults too! This is the gourmet homemade version of Little Debbie’s Cosmic Brownies. They taste just like them if not better.
Prep Time20 minutes
Cook Time20 minutes
Total Time40 minutes
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Ingredients

Brownie Batter

  • ⅓ cup unsweetened cocoa powder
  • ½ cup all-purpose flour
  • ¼ teaspoon salt
  • ½ cup unsalted butter melted
  • 3/4 cup white sugar
  • 1/4 cup brown sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract

Chocolate Frosting

  • 3 tablespoons unsalted butter melted
  • 1/3 cup sugar
  • 2 tablespoons heavy cream
  • 1/3 cup chocolate chips milk or semi-sweet

Other

  • 1/4 cup rainbow chips

Instructions 

  1. Preheat oven to 350°F.
  2. Line an 8 inch x 8 inch baking pan with parchment paper. Set aside.
  3. In a mixing bowl, whisk together cocoa powder, flour, and salt.
  4. Then, add the melted butter, white sugar, brown sugar, eggs, and vanilla extract. Combine together with a rubber spatula but do not over mix.
  5. Transfer into baking pan and pop in the oven to bake for 20 to 25 minutes. Do not overcook.
  6. While it bakes, make your frosting. Add the melted unsalted butter, sugar, heavy cream, and chocolate chips/chunks to a microwave-safe bowl. Microwave in 15 second intervals, mixing in between until the chocolate is melted (only took 30 seconds for me).
  7. Take the brownies out of the oven and allow to cool to room temperature.
  8. Add the frosting on top and chill for a few minutes in the fridge until the frosting is firm and not runny.
  9. Sprinkle on the rainbow chips and cut into rectangles!

Notes

  • Here are the rainbow chips I purchased off Amazon. I just removed the black colored ones to make it look just like the original.
  • For the frosting, you can make it with milk or semi-sweet chocolate chips/chunks. If you don’t mind a stronger chocolate taste, use semi-sweet like me. If you like it less strong, use milk.

Did You Make This Recipe?

If you make this recipe, leave a comment below and let me know how it turns out. I love hearing from you!

Rate & Review

Recipe Rating




4 people are discussing this recipe. Join in

  1. Maria
    Reply

    5 stars
    This is the easiest and most delicious recipe i’ve ever tried, and i’ve been baking for 9 years. Today I was looking for a quick recipe that didn’t use a ton of butter and that didn’t use a chocolate bar but rather only cocoa powder and wow, this is it. Its so incredibly delicious on its own and then the topping is also amazing, im still waiting for it to set but it tastes delicious. If you’re skeptical, don’t be! This recipe is a must try, its my new favorite go to brownie recipe. Congrats!

  2. Ariana
    Reply

    4 stars
    It was super yummy!! But I didn’t find it tasted much like cosmic brownies and they felt superrrr sweet. I’ll try making them again with less sugar 🙂 thanks for the recipe though!!

  3. Emily
    Reply

    5 stars
    These brownies were so good. Even better than store bought cosmic brownies. I took them to work and they were gone in an hour! And I got so many compliments!

  4. Zaynab
    Reply

    5 stars
    I have never tried the store brought cosmo brownies but thought these would be good AND THEY WERE SOOOOOOOOOOOOOO GOOOD LOVED THEM!

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