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cosmic brownies on a wire rack, one with a bite taken out
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4.89 from 9 votes

Cosmic Brownies Recipe

These ultra rich and fudgy brownies are the thing that childhood dreams were made of! Super chocolatey and delicious like the original only so much better!
Prep Time25 minutes
Cook Time30 minutes
Course: Dessert
Cuisine: amercian
Keyword: cosmic brownies
Servings: 30 servings
Author: Karli Bitner

Ingredients

Brownies

  • 1 1/2 cups salted butter partially melted
  • 1 3/4 cups brown sugar
  • 3/4 cup granulated sugar
  • 5 eggs
  • 2 tbsp corn syrup
  • 1 tbsp vanilla extract
  • 3 cups all purpose flour
  • 1 1/4 cup dutch processed cocoa powder
  • 1 tbsp cornstarch
  • 1 tsp salt
  • 1 tsp soda

Fudge Frosting and Toppings

  • 1/2 cup salted butter softened
  • 3 oz cream cheese room temperature
  • 3/4 cup dutch processed cocoa powder
  • 3 cups powdered sugar
  • 2 1/2 tsp vanilla extract
  • milk as needed to thin
  • candy coated chocolate chips

Instructions

Brownies

  • Preheat the oven to 350°. Prepare a 9x13 baking pan with parchment paper.
  • In the bowl of a stand mixer or in a large bowl with an electric hand mixer, cream together the partially melted butter, brown sugar and granulated sugar for a full 5 minutes at the highest speed. The mixture will be extremely light in color and very fluffy.
  • Add the eggs, corn syrup and vanilla. Mix again at the highest speed for an additional 5 minutes.
  • Add the flour, cocoa powder, cornstarch, salt and soda to the bowl. Mix until everything is just combined. Fold the mixture by hand a few times to make sure that everything is mixed together.
  • Transfer the brownie batter to the prepared 9x13 pan. Spread the mixture until it is smooth and even.
  • Bake at 350° for 25-30 minutes. The brownies will rise significantly, the edges will begin to crackle and you should be able to test the center of the brownies with a toothpick and a few moist crumbs should come up on the toothpick when they are ready to come out of the oven.
  • Immediately upon taking the brownies out of the oven, drop the pan onto a cutting board or your stovetop multiple times to let the excess air out of the center of the brownies. This will cause the brownies to deflate and give us that extra fudgey texture.

Fudge Frosting

  • While the brownies start to cool, make the frosting.
  • Make the frosting by first creaming together the butter and cream cheese until smooth.
  • Scrape the sides of the bowl and add in the cocoa powder. Add a tsp or two of milk to help bring the mixture together.
  • Mix on the lowest setting, so we avoid adding extra air to the frosting.
  • Next, add in the powdered sugar, again, adding a little bit of milk, as needed, to bring the mixture together while mixing on the lowest setting.
  • Add in the vanilla and mix until combined. The frosting should be thick, creamy and dark in color.
  • Scoop dollops of the frosting onto the top of the brownies. The heat from the brownies will slightly melt the frosting making it easier to spread.
  • Spread the frosting onto the brownies to cover the center of the brownies.
  • Return the brownies to the warm (but off) oven for 3-5 minutes to melt the frosting onto the brownies (this will help get that silky smooth appearance on top of the frosting)
  • Immediately sprinkle the candy coated chocolate chips on top of the frosting.
  • Allow the brownies to cool completely in the pan before cutting.
  • Note: I actually like to freeze my brownies for about 30 minutes before cutting to make it easier to get the brownies out of the pan and easier to get clean cuts. Store at room temp or in the fridge in an air tight container.