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Cosmic Brownies

Cosmic Brownies – a homemade version of the childhood favorite.  Rich and fudgy brownies topped with a chocolate fudge frosting and rainbow sprinkles. 

When I was a kid I absolutely LOVED the Little Debbie Cosmic Brownies.  They first came with just nuts on top, which I ALWAYS picked off.  I am not a fan of nuts in dessert, so they were always fully removed before I ate the brownies.  Then they introduced the Cosmic Brownies with the sprinkles on top, and I was totally in love.  It was a lunch box staple for many years!

I am pretty sure the Little Debbie brownies were the start of my love of brownies.  They still remain one of my favorite all time treats! 

Copycat Little Debbie Brownies. Fudgy, rich, and delicious


What are Cosmic Brownies

They are a rich chocolate brownie topped with a chocolate fudge topping and sprinkled with rainbow sprinkles. This recipe is a copycat of the version Little Debbie sells.  

How Do You Make Cosmic Brownies

  1. Brownie Batter – start by melting the butter and mixing together the wet ingredients.  Then fold in the dry ingredients, being careful not to over mix.  Bake until a tooth pick comes up with just a few crumbs.  You want to just slightly under bake the brownies. 
  2. Frosting – Let the brownies cool completely and then mix the chocolate and cream together to make the chocolate fudge. Pour over the brownies and let it set up.  
  3. Sprinkles – After the ganache is spread, sprinkle with the candy coated chocolate chips or sprinkles. 
  4. Slice – Once the chocolate has completely set, cut into squares and store in an air tight container in the fridge.  
Fudgy brownies topped with a chocolate ganache and topped with sprinkles.

Tips for Making Brownies

  • You can find the rainbow sprinkles at most craft stores and even some grocery stores.  I have seen these at Michael’s, Hobby Lobby and even Kroger grocery stores.  They are candy coated chocolate chips, but you can use regular sprinkles or even mini M&M’s if that is what you have or can find. 
  • Brownies are best stored in the fridge, so the topping does not melt.  You can let them sit out for a few minutes to warm up before serving, just be careful if it is a hot day or they are quite messy to eat. 
  • As with most brownies I make, these are best of they are just slightly under baked.  They do continue to cook a little bit after you take them out of the oven.  This helps give them the dense texture and make them super fudgy. 
  • Use a good quality chocolate.  These are obviously chocolate centered, so you want to make sure they taste as good as possible.  This goes for the cocoa powder in the brownies and the chocolate for the topping.  Dutch processed cocoa powder gives you the richest flavor.
  • Store brownies in an air tight container.  You want to make sure these are covered and stored well, they do have a tendency to dry out quickly.  
Cosmic Brownies just like Little Debbie brownies.

Can you Freeze Cosmic Brownies

These freeze really well!  You can wrap each brownie individually in plastic wrap and then store in a freezer safe bag.  They are perfect for a lunch box treat, just like when you were a kid!

These are for more than just kids.  This homemade version is super rich and fudgy and something everyone is going to love.  So mix up a batch today!  

Little Debbie Cosmic Brownies made at home

More Brownie Recipes to Try

cosmic brownies pinterest collage
Yield: 16

Cosmic Brownies

Cosmic Brownies - a homemade version of the childhood favorite.  Rich and fudgy brownies topped with a chocolate fudge frosting and rainbow sprinkles. 

Cosmic Brownies - a homemade version of the childhood favorite.  Rich and fudgy brownies topped with a chocolate fudge frosting and rainbow sprinkles. 

Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes


  • 1/2 cup butter, melted
  • 1 cup granulated sugar
  • 1/4 cup light brown sugar
  • 1 tsp vanilla extract
  • 2 whole eggs
  • 3/4 cup all-purpose flour
  • 1/2 cup cocoa powder
  • 1 Tbsp cornstarch
  • 1/4 cup rainbow sprinkles

Chocolate Topping

  • 1 1/4 cup semi-sweet chocolate
  • 1/3 cup heavy cream


  1. Preheat oven to 350 degrees F. Line an 8 inch baking with foil or grease well.
  2. In a bowl mix together melted butter with sugar and brown sugar until well combined. Add in vanilla and eggs and beat until smooth. Gently mix in flour, cocoa powder and cornstarch until just combined.
  3. Pour batter into prepared pan. Bake for 25-30 minutes until a tester comes out mostly clean. Remove from oven and cool completely.
  4. Heat heavy cream in a bowl for 45 seconds. Add chocolate and let stand for 2 minutes, then mix until chocolate is melted and is smooth.
  5. Pour over brownies and spread evenly. Sprinkle with rainbow sprinkles.
  6. Set in fridge until chocolate is set. Slice and serve.

Nutrition Information



Serving Size


Amount Per Serving Calories 250Total Fat 13gSaturated Fat 7gTrans Fat 0gUnsaturated Fat 5gCholesterol 44mgSodium 59mgCarbohydrates 33gFiber 1gSugar 24gProtein 3g

Nutrition Disclaimer: All information presented on this site is intended for informational purposes only. I am not a certified nutritionist and any nutritional information shared on should only be used as a general guideline.

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Erin S
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Sunday 10th of July 2022

Where do u buy the candy coated chocolate sprinkles , I can't find them


Wednesday 26th of August 2020

These bring me back to my childhood! Love this!

Toni Dash

Wednesday 26th of August 2020

These brownies are totally irresistible! Can't wait to make it again!


Tuesday 25th of August 2020

Absolutely loved these as a kid, so glad I can make them myself and they taste just as good!

Allyson Zea

Tuesday 25th of August 2020

I love how simple and easy this recipe is! Thank you so much!

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