Cosmic Brownies are just like the childhood treats you loved, but even better! Homemade fudgy brownies are topped with a layer of sweet chocolate frosting and speckled with colorful candies.

cosmic brownies on parchment paper.

This post may include affiliate links that earn us a small commission from your purchases at no extra cost to you.

What’s in a Cosmic Brownie?

These homemade brownies are chewy and thin, just like the Little Debbie snacks you know and love. The frosting on top is so smooth, chocolatey, and perfectly sweet! Of course, what really makes these brownies cosmic in appearance is the sprinkle of rainbow candy-coated chocolate chips on top.

  • All-Purpose Flour: Gives these brownies structure and texture.
  • Unsweetened Cocoa Powder: Gives these brownies their rich chocolate flavor. You can use any cocoa powder you prefer, as long as it is unsweetened. Use natural cocoa powder for a more natural taste, and use Dutch-process cocoa powder for a smoother taste.
  • Unsalted Butter: Adds moisture and richness to the brownies. You can use a neutral oil, such as vegetable, canola, or coconut oil, in place of the butter, but your brownies may not turn out as soft.
  • Sugar: A mixture of granulated and brown sugar sweetens these brownies while also giving them. rich, molasses-y flavor.
  • Eggs: Give these brownies structure and even more richness.
  • Vanilla Extract: Enhances the chocolate flavor of the brownies.
  • Kosher Salt: Enhances the chocolate flavor of the brownies.
  • Chocolate Chips: Melt down to create a rich ganache frosting. Feel free to use milk, semisweet, or dark chocolate chips in the ganache to make these brownies to your taste.
  • Heavy Cream: Thins out the chocolate chips to create a rich ganache.
  • Rainbow Candy-Coated Chocolate Chips: Add fun color and a yummy crunch to the brownies. If you can’t find them, you can use mini M&M’s or rainbow sprinkles instead.

Pro Tip: Feel free to add up to 1 cup of mix-ins to these brownies, such as chocolate chips or nuts.

Variations on Little Debbie Cosmic Brownies

This cosmic brownie recipe closely follows the iconic snack, but you can also make it your own with some simple modifications. Add a few drops of peppermint, coconut, or almond extract to the brownies to change their flavor. After pouring the brownie batter into the pan, you can swirl in some peanut butter, caramel sauce, Nutella, cookie butter, marshmallow fluff, or cream cheese. You could also add some of the rainbow candy-coated chocolate chips into the batter for even more fun color!

step by step photos for how to make cosmic brownies.
Email This Recipe
Enter your email and we’ll send the recipe directly to you!
Please enable JavaScript in your browser to complete this form.
What are cosmic brownies?

Cosmic brownies are fudge brownies topped with chocolate frosting and candy-coated rainbow sprinkles. They were created in 1999 by Little Debbie to capitalize on the booming cosmic bowling trend.

Do cosmic brownies have nuts?

No, these brownies do not contain any nuts, but you could absolutely add some if you’d like. Chopped walnuts or pecans would be delicious!

Are cosmic brownies gluten-free?

No, these brownies are not naturally gluten-free. You could make them gluten-free by using a gluten-free 1:1 baking flour in place of the all-purpose flour.

Can I make cosmic brownies with oil instead of butter?

Yes, you can make these brownies with an equal amount of vegetable oil, canola oil, or coconut oil. Your brownies may turn out less fudgy and soft, though!

Why did my cosmic brownies turn out crumbly?

Your cosmic brownies may turn out crumbly if you don’t measure your ingredients carefully. Be sure to spoon and level your dry ingredients for the most accurate results.

Where can I get rainbow candy-coated chocolate chips?

Unfortunately, I have not found these specialty candies in grocery stores. However, they are easily found on both Amazon and Nuts.com, or you can always substitute them for mini M&M’s or regular rainbow sprinkles. If you choose to use rainbow sprinkles, I recommend nonpareils for the closest look to the original.

scattered cosmic brownies on a parchment lined wire rack.

How to Make Ahead and Store

You can bake these cosmic brownies up to 1 day in advance and frost them on the day you plan to serve them. Store the unfrosted brownies in an airtight container at room temperature until ready to frost and serve.

Store leftover cosmic brownies in an airtight container in the refrigerator for up to 5 days. Although they are safe to store at room temperature, I do not recommend it, as the frosting tends to melt off in warmer temperatures. Bring the brownies to room temperature for about 10 minutes before serving.

How to Freeze

Freeze cosmic brownies cut into individual slices and wrapped in 2 layers of plastic wrap and 1 layer of aluminum foil for up to 2 months. Let thaw at room temperature before serving.

Serving Suggestions

Serve these cosmic brownies with a scoop of red velvet ice cream, white chocolate mousse, no bake cheesecake cups, or chocolate pots de creme for an even more indulgent dessert.

Or enjoy them simply with chocolate coffee, an iced mocha, or an iced chai tea latte. And who could say no to a Bailey’s milkshake, frozen caramel hot chocolate, or hot buttered rum?

a bitten cosmic brownie atop a stack of 3 cosmic brownies.

Be sure to try my copycat Hostess cupcakes for more nostalgic treats!

Recipe Card

Cosmic Brownies Recipe

5 from 8 votes
Prep: 20 minutes
Cook: 30 minutes
Total: 50 minutes
Servings: 16 brownies
Author: Becky Hardin
featured cosmic brownies.
Homemade Cosmic Brownies are just like the childhood treats you loved, but even better! Homemade fudgy brownies are topped with a layer of sweet chocolate frosting and speckled with colorful candies. 
Save this recipe!
Enter your email and we’ll send the recipe directly to you, plus new recipes weekly!
Please enable JavaScript in your browser to complete this form.

Ingredients 

  • ¾ cup all-purpose flour 90 grams
  • cup unsweetened cocoa powder 56 grams
  • 12 tablespoons unsalted butter 170 grams, melted (1½ sticks)
  • 1 cup granulated sugar 200 grams
  • 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
  • ½ cup heavy cream 114 grams
  • ¼ cup rainbow candy-coated chocolate chips 43 grams, for topping

Instructions 

  • Preheat oven to 325°F. Spray a 9×9-inch baking pan with nonstick spray and line it with parchment paper. Set aside.
    overhead view of ingredients for cosmic brownies.
  • In a medium bowl, whisk the flour and cocoa powder together.
    ¾ cup all-purpose flour, ⅔ cup unsweetened cocoa powder
  • In a separate larger bowl, whisk the butter and sugars together.
    12 tablespoons unsalted butter, 1 cup granulated sugar, ½ cup brown sugar
  • Add in the eggs, vanilla extract, and salt.
    2 large eggs, 1 teaspoon pure vanilla extract, ¾ teaspoon kosher salt
  • Add the flour mixture to the wet ingredients and stir until just combined.
  • Pour the batter into the pan, and use a spatula to spread it out.
    cosmic brownie batter in a parchment lined baking pan.
  • Bake for 30-35 minutes, or until a toothpick comes out nearly clean. Allow brownies to cool.
  • While the brownies are baking, place the chocolate chips in a bowl.
    1 cup chocolate chips
  • Heat the heavy cream for 1-2 minutes in the microwave or on the stove.
    ½ cup heavy cream
  • Once heated, pour the cream over the chocolate chips.
  • Gently stir until the chocolate has melted and the mixture is smooth and creamy.
  • Spread the frosting out over the brownies. Then, sprinkle rainbow chips over the frosting.
    ¼ cup rainbow candy-coated chocolate chips
    chocolate ganache being spread over cosmic brownies in a baking pan.
  • Refrigerate or freeze to let the frosting set before enjoying!
    cosmic brownies in a baking pan,

Video

Becky’s Tips

  • For gluten-free brownies, swap the all-purpose flour for gluten-free 1:1 baking flour.
  • You can use a neutral oil, such as vegetable, canola, or coconut oil, in place of the butter, but your brownies may not turn out as soft.
  • If using salted butter, omit the kosher salt.
  • You can use all brown sugar in place of the granulated sugar for a richer flavor.
  • Feel free to add up to 1 cup of mix-ins to these brownies, such as chocolate chips or nuts.
  • Feel free to use milk, semisweet, or dark chocolate chips in the ganache to make these brownies to your taste.
  • In place of the rainbow candy-coated chocolate chips, you can use mini M&M’s or rainbow sprinkles.
  • Do NOT skip lining your pan. A parchment paper sling will help you to more easily remove the brownies from the pan.
  • Take care not to overmix the batter; otherwise, your brownies may come out tough.
  • To cut these brownies cleanly, dip a knife in hot water, then wipe it off between slices.
Storage: Store cosmic brownies in an airtight container in the refrigerator for up to 5 days or in the freezer for up to 2 months.
Serving: 1brownieCalories: 287kcalCarbohydrates: 35gProtein: 3gFat: 16gSaturated Fat: 10gPolyunsaturated Fat: 1gMonounsaturated Fat: 3gTrans Fat: 0.4gCholesterol: 55mgSodium: 126mgPotassium: 121mgFiber: 2gSugar: 28gVitamin A: 413IUVitamin C: 0.1mgCalcium: 34mgIron: 1mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Did you make this? Leave a comment!

More Chocolate Brownie Recipes We Love

Meet Becky Hardin

Becky Hardin is a wife and mother living in Saint Louis Missouri. She founded The Cookie Rookie in 2012 as a creative way to share recipes. Now, she is a trusted resource for easy cooking around the world, being featured in Taste of Home, The Kitchn, ABC’s Home and Family, and more. Here at The Cookie Rookie she is the editor in chief of all recipes and continues to enjoy sharing her passion for cooking for busy families. She has since founded two additional food blogs, Easy Chicken Recipes and Easy Dessert Recipes.

5 from 8 votes (8 ratings without comment)
Subscribe
Notify of
guest
Recipe Rating




This site uses Akismet to reduce spam. Learn how your comment data is processed.

0 Comments
Inline Feedbacks
View all comments