Name: Cosmic Brownies
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 9 bars
Cuisine: American

Organically Addison Verified

October 12, 2025

11 Ingredients

EASY

These classic Cosmic Brownies are nostalgic, fun, rich, and decadent! This copycat recipe will remind you of your childhood. These brownies are quick and easy to make at home. You will love the dense, fudgy brownies, smooth chocolate frosting, and fun rainbow sprinkles!

From the Cook

1/11

Cosmic Brownies

Organically Addison Verified

Ingredients

bars

WarningMilk and 5 other allergens identified

Instructions

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Instructions

First, preheat your oven to 350 degrees Fahrenheit. Line an 8 inch square pan with parchment paper.

In a large bowl, combine the sugar, light brown sugar, melted butter, and cocoa powder. Stir vigorously for 2 minutes.

Then, add in the vanilla, eggs, and egg yolk. Stir to combine.

Add in the gluten free flour and tapioca flour. Stir until a slightly thick brownie batter forms.

Transfer the batter to the prepared pan. Smooth into an even layer.

Bake for 24 to 27 minutes, or until a toothpick inserted comes out with only a few moist crumbs.

Once the brownies have fully cooled, top with chocolate frosting and sprinkles. Refrigerate for 1 hour, or until the frosting has firmed up and set.

Finally, slice and serve!

Bite Tutorial

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Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

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About the Cook

Organically Addison

Hello, my name is Addison! I am a gluten free food blogger, food photographer, and founder of Organically Addison. I have been blogging for 5 years and now operate 4 websites! In 2024, I launched Sweet Addison’s and became a food brand founder. Sweet Addison’s specializes in creating gourmet gluten free dairy free desserts with nationwide shipping.