If you love the classic Little Debbie treats as much as we do, you’ll get a kick out of these homemade Cosmic Brownies!
Homemade Cosmic Brownies Recipe
Little Debbie Cosmic Brownies were my favorite treat growing up. No joke… I packed a Cosmic Brownie in my school lunch every single day all the way until I graduated high school.
See, I already loved the the Little Debbie brownies, you know, the ones with nuts on top. I’m not a huge fan of nuts in my brownies, so when they introduced cosmic brownies, with their rainbow chocolate sprinkles on top, I switched and never looked back.
This is a fun recipe to make at home for parties – what a nostalgic treat!
Related: For another fun brownie recipe, try our Pecan Pie Brownies too!
Cosmic Brownies Ingredients
For your convenience, I’ve provided shop-able ad links to some of the ingredients and kitchen supplies used to make our cosmic brownies; read our disclosure policy here.
For the Brownies:
- 1 1/4 cups flour
- 3/4 cup unsweetened cocoa powder
- 1 cup sugar
- 2/3 cup packed brown sugar
- 1 1/2 sticks unsweetened butter (melted)
- 2 large eggs (room temp)
- 3 Tablespoons milk
- 1/2 teaspoon baking powder
- 1 Tablespoons cornstarch
- pinch salt
- 2 teaspoons vanilla
For the Frosting:
- 3/4 cup heavy whipping cream
- 1 cup semi sweet chocolate chips
- Rainbow Chips
Kitchen Tools Used:
- Non-slip mixing bowls
- Medium saucepan
- Wire whisk
- 9×13″ baking pan (This one comes with a handy lid!)
- Parchment paper
How to Make Cosmic Brownies
Brownie Directions:
Preheat oven to 350°F and line a 9×13″ baking dish with parchment paper. Mist with baking spray and set aside.
Beat melted butter, sugars, and vanilla in a large bowl using an electric mixer or stand mixer.
Add eggs, one at a time, continuing to mix until well incorporated.
In a separate mixing bowl, whisk together flour, cocoa powder, baking powder, cornstarch, and salt.
Gradually add the flour mixture to your batter, mixing on low speed. Alternate adding flour and milk, until everything is combined.
Your batter should be fairly thick:
Scoop batter into your baking pan and spread with a spatula as evenly as possible.
Bake at 350°F for 18-25 minutes, taking care not to overcook.
Remove from oven and allow to cool in the pan.
Frosting Directions:
Heat heavy whipping cream in a saucepan heating until simmering. Add chocolate chips and whisk until melted and smooth.
Remove from heat and allow to cool slightly so the ganache thickens, but is still pourable.
Pour ganache over the top of the brownies and smooth with a spatula.
Sprinkle rainbow chips over the top of the brownies, while frosting is still wet.
Allow to set, then slice and enjoy!
More of our favorite brownie recipes:
- Best Ever Brownies from Scratch
- Chocolate Covered Strawberry Brownies
- Easy Football Brownies
- Chocolate Avocado Brownies
- Slutty Brownies
- Pecan Pie Brownies
Cosmic Brownie Recipe (Free Printable Copy):
If you like this recipe, please rate it! We’d also love to hear your thoughts in the comments below.
Homemade Cosmic Brownies
Ingredients
For the Brownies:
- 3/4 cup butter unsalted, melted
- 1 cup granulated sugar
- 2/3 cup brown sugar packed
- 2 teaspoons vanilla
- 2 eggs room temp
- 1 1/4 cups flour
- 3/4 cup unsweetened cocoa powder
- 1/2 teaspoon baking powder
- 1 Tablespoon cornstarch
- pinch of salt
- 3 Tablespoons milk
For the Frosting:
- 3/4 cup heavy whipping cream
- 1 cup semi sweet chocolate chips
- 2 small bags of Rainbow Chips
Instructions
Brownie Directions:
- Preheat oven to 350 degrees and line a 9x13" baking dish with parchment paper. Mist with baking spray and set aside.
- Beat melted butter, sugars, and vanilla in a large bowl using an electric mixer or stand mixer.
- Add eggs, one at a time, continuing to mix until well incorporated.
- In a separate mixing bowl, whisk together flour, cocoa powder, baking powder, cornstarch, and salt.
- Gradually add the flour mixture to your batter, mixing on low speed. Alternate adding flour and milk, until everything is combined. Your batter should be fairly thick.
- Scoop batter into your baking pan and spread with a spatula as evenly as possible.
- Bake at 350°F for 18-25 minutes, taking care not to overcook.
- Remove from oven and allow to cool in the pan.
Frosting Directions:
- Heat heavy whipping cream in a saucepan heating until simmering. Add chocolate chips and whisk until melted and smooth.
- Remove from heat and allow to cool slightly so the ganache thickens, but is still pourable.
- Pour ganache over the top of the brownies and smooth with a spatula.
- Sprinkle rainbow chips over the top of the brownies, while frosting is still wet.
- Allow to set, then slice and enjoy!
Notes
Nutrition
Be sure to pin our cosmic brownie recipe on Pinterest:
More of our favorite brownie recipes:
Perfect Brownies from Scratch Recipe
“Secret Ingredient” Chocolate & Peanut Butter Brownies
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Hunter Rose says
This was a really nice recipe but I don’t feel like it was exactly a clone. The topping was very much dark chocolate and I made it. The original is more of a milk chocolate. I loved it, my girlfriend didn’t care so much for it. Did I do something wrong to make the ganache more bitter than it should have been?
Stacey aka the Soccer Mom says
It’s possible the type of chocolate chips could affect the sweetness – you might try milk chocolate chips next time if that is the flavor profile you like best 🙂