This post may contain affiliate links. For more information, read my disclosure policy.

This is a homemade version of the classic Cosmic Brownies! These brownies are ultra fudgy brownies, super thick and chocolatey with a rich and thick chocolate ganache frosting and rainbow chips! These are way better than store bought.

stacked chocolate brownies with colorful chocolate candy baked in.

I used to always eat Cosmic Brownies treats when I was younger and I know I’m not alone. The flavor of these chewy Little Debbie treats is nostalgic to me, so I knew I needed to recreate this special treat at home. The brownies are just like the original classic chocolate treat, but now you can make them from scratch!

These brownies are an all-out chocolate experience – soft and chewy brownies with a rich delicious fudge icing – and don’t forget a sprinkling of rainbow-colored chips! If you want to be brought back to your childhood, this recipe is the way to go.

ingredients in cosmo brownies laid out on a white marble counter.

Ingredients for Cosmic Brownies

  • Sugar: This recipe uses both granulated sugar and brown sugar to get that chewy texture.
  • Cocoa Powder: These are cocoa powder brownies, making them one bowl brownies. Use natural unsweetened cocoa so they’re most like the original.
  • Butter and Oil: Butter makes brownies ultra-fudgy and oil helps with the chewy texture, crisp edges, and matte finish. The combination makes the perfect brownies!
  • Chocolate Candy: I used rainbow candy-coated chocolate chips to get them as exact to the original recipe. You can find them on Amazon or Walmart.
  • Chocolate Chips and Heavy Whipping Cream: these make the ganache topping. There is no substitute for heavy cream. I prefer semi-sweet chocolate chips to be the closest to the original recipe.
stacked chocolate brownies with colorful chocolate candy baked in.

SAVE THIS RECIPE

We'll email this post to you, so you can come back to it later!

Storage Instructions

Store brownies in an airtight container. You can store them at room temperature or in the fridge, but they’ll taste better room temp. You can also freeze these treats.

Dorothy’s Expert Tips

  • If you can’t find the rainbow chips, you could swap them with mini M&Ms.
  • If you only have salted butter, you can use it, but reduce added salt to 1/4 teaspoon.
  • Use a metal pan for best results whenever baking brownies or bars.
  • Be sure to whisk the eggs into the sugar mixture vigorously for at least a minute; this will create that fudgy center and crinkly top.
  • You know brownies are done baking when a toothpick inserted 2-inches from the edge of the pan comes out with just a few crumbs.
SUBSTITUTIONS
OTHER RECIPES
stacked chocolate brownies with colorful chocolate candy baked in.

Cosmic Brownies Recipe

5 from 1 vote
These Cosmic Brownies are a replica of the classic recipe that everyone remembers from their childhood. They are fudgy and delicious.

Recipe Video

Prep Time 30 minutes
Cook Time 25 minutes
Chill Time 1 hour
Total Time 1 hour 55 minutes
Yield 16 servings
Serving Size 1 serving
Save RecipeRate RecipePrint Recipe

Ingredients
 

Brownies:

  • 8 tablespoons (113g) unsalted butter, melted
  • 2 tablespoons vegetable oil
  • 1 cup (200g) granulated sugar
  • ⅓ cup (67g) packed brown sugar
  • ⅔ cup (54g) unsweetened cocoa powder
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • ½ teaspoon salt
  • ½ cup (62g) all-purpose flour

Topping:

Instructions

  • Preheat oven to 350°F. Line a 9×9-inch pan with foil or parchment paper and spray with nonstick cooking spray.
  • Stir together melted butter, oil, and both sugars.
  • Stir in cocoa powder, eggs, vanilla and salt, then gently stir in flour.
  • Pour batter into prepared pan. Bake 18-22 minutes, or until a toothpick comes out clean 2-inches from the edge of the pan. Cool completely before frosting.
  • Add chocolate chips and heavy whipping cream to a microwave safe bowl. Heat 1 minute on high power, then stir until smooth (heating time is dependent on your microwave; may need more or less time).
  • Pour chocolate over the brownies and spread to smooth evenly. Sprinkle with candy coated chips. Chill to set frosting.
Save this recipe!
Get this recipe emailed to you – plus get all recipes sent straight to your email!

Recipe Notes

  • Store in an airtight container on the counter or freeze.
  • Frosting will be fudgy but solid when cold; will get softer when room temperature.

Recipe Nutrition

Serving: 1serving | Calories: 312kcal | Carbohydrates: 43g | Protein: 4g | Fat: 16g | Saturated Fat: 9g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.3g | Cholesterol: 47mg | Sodium: 99mg | Potassium: 181mg | Fiber: 4g | Sugar: 31g | Vitamin A: 362IU | Vitamin C: 0.1mg | Calcium: 47mg | Iron: 2mg
Nutritional information not guaranteed to be accurate
Course Dessert
Cuisine American
Author Dorothy Kern

Did you try this recipe? Click the stars to rate the recipe below

process shot of cosmic brownies being made.
process shot of cosmic brownies being made.

How to make Copycat Cosmic Brownies step-by-step

  1. Mix up your brownie batter by stirring all the brownie ingredients in a large bowl. Pour batter into a 9-inch pan. Bake until a toothpick comes out clean 2-inches from the edge of the pan. Cool completely before frosting.
  2. Add chocolate chips and heavy whipping cream to a microwave safe bowl. Heat and stir until smooth.
  3. Pour chocolate over the brownies and spread to smooth evenly. Sprinkle with candy coated chips. Chill to set frosting.

Other Brownie Recipes

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

Learn More About Me
5 from 1 vote

Leave a Comment

Your email address will not be published. Required fields are marked *

Recipe Rating




2 Comments