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Cosmic Brownies

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close up shot of Cosmic Brownies stacked on top of each other
This homemade Cosmic Brownies recipe creates amazing brownies with a rich fudgy texture and colorful sprinkles on top.
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Table of Contents
  1. Cosmic Brownies Ingredients  
  2. How To Make This Cosmic Brownies Recipe 
  3. How To Serve
  4. Storage 
  5. More Recipes You’ll Love
  6. JUMP TO RECIPE

If you have ever enjoyed the Little Debbie Cosmic Brownies, then you are going to love the homemade version. You can make these scrumptious, fudgy brownies topped with delicious fudge icing and a sprinkling of rainbow-colored sprinkles right from the comfort of your home.

close up shot of cosmic brownies with a bite taken out

Cosmic Brownies Ingredients  

Cosmic Brownies raw ingredients that are labeled

You’ll need: 

For the Brownies

  • 1 cup granulated sugar
  • 6 tablespoons unsalted butter, softened 
  • 2 eggs
  • 1 egg yolk 
  • 1 teaspoon vanilla extract
  • ½ cup all-purpose flour 
  • ⅓ cup cocoa powder 
  • ¼ teaspoon salt 
  • 2 tablespoons milk 

For the Frosting

  • ⅓ cup heavy cream
  • ½ cup semi-sweet chocolate, chopped 
  • ½ cup milk chocolate, chopped 
  • 1 tablespoon butter, cut into 4 pieces 
  • ½ teaspoon vanilla extract 
  • ¼ cup rainbow chip sprinkles 

SUBSTITUTIONS AND ADDITIONS

NUTS: While my kiddos tend to prefer the classic rainbow sprinkles, I prefer to put nuts on my Cosmic Brownies. I love to add crushed walnuts or pecans to half the batch so that we can all enjoy our brownies just the way we like them! 

How To Make This Cosmic Brownies Recipe 

STEP ONE: Preheat the oven to 350°F. Line a 9×9-inch square pan, with a piece of parchment paper, leaving an overhang on both sides. Coat the pan with cooking spray. 

OUR RECIPE DEVELOPER SAYS

Lining the pan with parchment paper will allow you to lift the entire square of baked brownies out of the pan for easier cutting once cooled.

STEP TWO: Add the white sugar and butter to a large bowl. Use an electric mixer to beat together until light and fluffy, about 1 minute. 

butter and sugar combined together in a bowl

STEP THREE: Add the eggs and vanilla extract to the bowl. Then beat for another 2 to 3 minutes, until the mixture is pale yellow and thick. 

egg and vanilla combined to the butter mixture in a bowl

STEP FOUR: Add the flour, cocoa powder, and salt. Mix on low speed until the ingredients are just incorporated. Pour in the milk and beat until smooth. 

flour, cocoa powder, salt and milk mixed with the vanilla mixture in a bowl

STEP FIVE: Pour the brownie batter into the prepared pan and spread it into an even layer. 

STEP SIX: Bake for 20 to 25 minutes, until a toothpick inserted into the center of the pan comes out clean or with just a few crumbs attached to it. 

PRO TIP:

Oven temperatures vary and may need to be recalibrated periodically to ensure they are accurate. Make sure to check your brownies at the lower end of the recommended baking time.

pour batter into a pan and spread evenly

STEP SEVEN: Let the brownies cool. 

STEP EIGHT: While the brownies are cooling, place the heavy cream in a medium bowl. Microwave in 20-second increments until the cream is very hot but not boiling. 

STEP NINE: Add the chopped chocolates to the cream. Let sit for a minute, then stir until a smooth chocolate mixture forms. Stir in the butter and vanilla extract until melted. 

chocolates added to the warm creamer and stirred together in a bowl

STEP TEN: Pour the chocolate over the top of the cooled brownies. Use a spatula to spread the chocolate into an even layer. Add the sprinkles on top of the chocolate. 

PRO TIP:

Some cosmic brownies can have nuts. Simply swap the nuts out for the sprinkles. 

chocolate poured over the top of the brownies as well as the sprinkles in a pan

STEP ELEVEN: Chill the frosted brownies until they set, about 2 hours to overnight. Use the parchment to lift the brownies out of the pan.

STEP TWELVE: Cut into squares and serve. 

How To Serve

These chewy brownies will delight your kiddos when they show up in their lunch box. You could also use them to make an extra special treat for dessert by topping them with a big scoop of ice cream and whipped cream.

Check out these other delicious, unique, and fun brownie recipes! Both Dr. Pepper brownies and peanut butter brownies are different from just your regular old brownies. They have their own unique flavors and ingredients, just like this recipe. 

Storage 

IN THE FRIDGE: You can store your cut brownies in an airtight container on the counter at room temperature, or in the fridge. They are best if eaten within 2 to 3 days. 

IN THE FREEZER: If you prefer to freeze this classic chocolate treat, let them cool completely, then simply wrap them tightly in plastic wrap and then in aluminum foil. Place them in the freezer for up to 3 months.

overhead shot of Cosmic Brownies

Who knew that making one of the best Little Debbie treats of all time could be so simple to do at home? This recipe makes it fun and easy to make Cosmic Brownies. They are a classic dessert that all can enjoy, at any age!

FREQUENTLY ASKED QUESTIONS

Can I freeze Cosmic Brownies?

This homemade Cosmic Brownie recipe can be kept in the freezer for up to three months. You will want to wrap them well with a layer of plastic wrap followed by a layer of foil.

Should I keep Cosmic Brownies on the counter or in the fridge?

These chocolatey brownies can safely be stored on the counter for up to three days.

Can I add nuts to the Cosmic Brownies?

If you would like to mix in nuts or add them on top, this would be a delicious variation.

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close up shot of Cosmic Brownies stacked on top of each other

Cosmic Brownies

5 from 1 vote
This homemade Cosmic Brownies recipe creates amazing brownies with a rich fudgy texture and colorful sprinkles on top.
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 1 hour 40 minutes
Servings 16

Ingredients
  

Brownies

  • 1 cup granulated sugar
  • 6 tablespoons unsalted butter, softened
  • 2 eggs
  • 1 egg yolk
  • 1 teaspoon vanilla extract
  • ½ cup all-purpose flour
  • cup cocoa powder
  • ¼ teaspoon salt
  • 2 tablespoons milk

Frosting

  • cup heavy cream
  • ½ cup semi-sweet chocolate, chopped
  • ½ cup milk chocolate, chopped
  • ½ teaspoon vanilla extract
  • 1 tablespoon butter, cut into 4 pieces
  • ¼ cup rainbow chip sprinkles

Instructions
 

  • Preheat the oven to 350°F. Line a 9×9-inch square pan with a piece of parchment paper, leaving an overhang on both sides. Coat the pan with cooking spray.
  • Add the sugar and butter to a large mixing bowl and use a hand mixer to beat together until light and fluffy, about 1 minute.
  • Add the eggs and vanilla to the bowl. Then beat for another 2 to 3 minutes until the mixture is pale yellow and thick.
  • Add the flour, cocoa powder, and salt. Mix on low speed until ingredients are just incorporated. Pour in the milk and beat until smooth.
  • Pour the batter into the prepared pan, and spread it into an even layer.
  • Bake for 20 to 25 minutes until a toothpick inserted into the center of the pan comes out clean or with just a few crumbs attached to it.
  • Let the brownies cool.
  • Place the heavy cream in a medium bowl. Microwave in 20-second increments until the cream is very hot but not boiling.
  • Add the chopped chocolates to the cream. Let sit for a minute, then stir until a smooth chocolate mixture forms. Stir in the butter and vanilla extract until melted.
  • Pour the chocolate over the top of the brownies. Use a spatula to spread the chocolate into an even layer. Add the sprinkles on top of the chocolate.
  • Chill the brownies until they set, about 2 hours to overnight. Use the parchment to lift the brownies out of the pan.
  • Cut into squares and serve. 

Notes

  • Lining the pan with parchment paper will allow you to lift the entire square of baked brownies out of the pan for easier cutting once cooled. 
  • Oven temperatures vary and may need to be recalibrated periodically to ensure they are accurate. Make sure to check your brownies at the lower end of the recommended baking time.
  • Some cosmic brownies can have nuts. Simply swap the nuts out for the sprinkles.

Nutrition

Calories: 211kcal | Carbohydrates: 25g | Protein: 2g | Fat: 12g | Saturated Fat: 7g | Trans Fat: 1g | Cholesterol: 53mg | Sodium: 56mg | Potassium: 96mg | Fiber: 1g | Sugar: 20g | Vitamin A: 278IU | Vitamin C: 1mg | Calcium: 19mg | Iron: 1mg
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