Fudgy, chocolatey, and adorable, these cosmic brownies are ten times better than store-bought.

A classmate had one in her lunch almost every day and she gave me a piece to try.

I was hooked after that first bite.

Stack of Homemade Cosmic Brownies and more on the counter around it

Simply Recipes / Mark Beahm

As Ive gotten older, my taste has evolved but my yearning for nostalgia is steadfast.

With that in mind, I present these: an upgraded, homemade version of a Cosmic Brownie.

Plus, they store well in the refrigerator, making them a wonderful make-ahead dessert for get-togethers.

Homemade Cosmic Brownies spread all over a counter

Simply Recipes / Mark Beahm

What are Cosmic Brownies?

Little Debbies Cosmic Browniesare inspired by cosmic bowling.

Cosmic bowling (or glow bowling as I knew it growing up) is outer space-themed, glow-in-the-dark bowling.

A stack of two homemade Cosmic Brownies on a plate with the top missing a bite

Simply Recipes / Mark Beahm

Think black lights, lasers, and lots of bright, neon colors against a dark bowling alley.

The colorful sprinkles set against the dark chocolate color of the fudgy brownie mimics this iconic look.

Upon re-tasting the store-bought version, I realized how crumbly yet sort of doughy the original is.

Homemade Cosmic Brownies on the counter

Simply Recipes / Mark Beahm

I also never realized how un-chocolate-y they are.

I knew I could do better.

Using a combination ofDutch-process cocoa powderand melted bittersweet chocolate ensures these brownies are undeniably chocolatey.

Parchment paper lined baking sheet for homemade Cosmic Brownies recipe

Simply Recipes / Mark Beahm

Moreover, the brownies come out beautifully fudgy with a moist, soft crumb.

You just need a little bit of patience and the right knife.

When aiming for clean slices,letting your brownies cool completely is crucial.

Pot of melted butter on a coaster for homemade Cosmic Brownie recipe

Simply Recipes / Mark Beahm

I think the true key to getting the cleanest cuts lies in the way you use your knife.

Moreover, a hot, dry knife will always result in a cleaner slice.

Lightly spray the pan once more, taking care to grease the parchment and sides.

Chocolate pieces added to pot with a whisk for Cosmic Brownie recipe

Simply Recipes / Mark Beahm

Remove from the heat.

Add the cocoa powder and oil to the hot butter and whisk to fully incorporate and bloom the cocoa.

Add the chopped bittersweet chocolate and whisk until fully melted and combined.

Chocolate pieces whisked into the melted butter and cocoa mixture in the pot for homemade Cosmic Brownie recipe

Simply Recipes / Mark Beahm

Set aside to cool slightly while you whisk the egg mixture.

Scrape the chocolate mixture into the bowl with the egg mixture and whisk to combine.

In a small bowl, whisk the flour, baking powder, and salt to combine.

Sugar, eggs, and vanilla whisked together in a bowl

Simply Recipes / Mark Beahm

Add the flour mixture to the chocolate mixture and whisk until just combined.

Its okay if there are some flour streaks.

The brownie batter will be on the thicker side.

Chocolate mixture whisked into the egg mixture for homemade cosmic brownies recipe

Simply Recipes / Mark Beahm

Once the brownies settle, they are typically ready.

Cool the brownies completely in their pan set over a wire rack, about 1 hour.

Once the brownies are cool, make the ganache.

Two bowls (L to R): bowl with dry ingredients and bowl of wet ingredients, each bowl has a whisk

Simply Recipes / Mark Beahm

Combine the chopped chocolate and pinch of salt in a small bowl or large glass measuring cup.

Lift the brownies out of the pan by the parchment overhang and transfer to a cutting board.

Its okay if it doesnt look completely smooth at first.

Homemade cosmic brownie mixture folded together using a rubber spatula

Simply Recipes / Mark Beahm

The ganache will settle into itself.

take a stab at avoid pushing the ganache over the sides.

Top the ganache with the candy-coated chocolate chip sprinkles as desired.

Homemade Cosmic Brownie batter in a lined baking pan

Simply Recipes / Mark Beahm

Then, cut each half into 4 pieces with the indentation running crosswise to yield 8 bars total.

Let us know with a rating and review!

Baking pan with homemade Cosmic Brownies on a cooling rack

Simply Recipes / Mark Beahm

Chocolate pieces in a bowl

Simply Recipes / Mark Beahm

Heavy cream added to bowl of chocolate for homemade Cosmic Brownie ganache

Simply Recipes / Mark Beahm

Bowl of ganache with a rubber spatula for homemade Cosmic Brownie ganache

Simply Recipes / Mark Beahm

Offset spatula used to spread ganache on the brownie on a parchment paper

Simply Recipes / Mark Beahm

Ganache covered homemade Cosmic Brownie on a piece of parchment paper

Simply Recipes / Mark Beahm

Chocolate chip rainbow candy sprinkled on the homemade Cosmic Brownie and more in a bowl

Simply Recipes / Mark Beahm

Homemade Cosmic Brownies sliced into bars on a cutting board

Simply Recipes / Mark Beahm

Homemade Cosmic Brownies (with signature perforated line) on a piece of parchment paper

Simply Recipes / Mark Beahm