Bringing back your favorite childhood treat! Cosmic brownies are a chewy chocolate fudge brownie with chocolate ganache frosting and topped with M&M pieces on top. These Little Debbie copycats are amazing!

These fudgy Cosmic Brownies will take you back to your childhood and those chocolatey intergalactic brownies in your lunchbox. These might even be better than the original Little Debbie’s brownies!

This fudgy and delicious brownie recipe comes together in one bowl in just a few minutes! You’ll love the rich chocolate flavor and texture so, it’s best to invite some friends over when you make a batch because portion control is quite difficult around them. Or not, and enjoy them with a bowl of vanilla ice cream like I do.

Be sure to grab the full recipe & check out the full video tutorial in the recipe card below. And if you try this recipe (I mean you totally should be), tag me on Instagram @imancake and use the hashtag #BakingWithMANCAKE.


  • If you don’t have an eight by eight inch pan for your brownies just use foil to create one or two walls for a smaller baking dish. Line with parchment and you’ll be good to go!
  • Measure your flour correctly! Adding too much flour to your brownies will take a way from that nice fudge-like texture. The best, and easiest way to measure flour is by using a scale. If you don’t have one then fluff your flour with a spoon, sprinkle it into your measuring cup, and use a knife to level it off. 
  • Don’t over-bake your brownies. Unlike cake layers brownies will not have springy center and a skewer inserted into the center will not come out clean. Your brownies are done when the center is set and you see the top just begin to crack. 
  • Add toasted nuts, crushed candy cane, toffee, or even candy like M&Ms to your brownies for a bit of crunch and flavor.

Frequently Asked Questions


Sure! You can use a larger pan and have thinner brownies OR you can make a wall inside of your pan with aluminum foil then line it with parchment paper.

Be sure to enter the MANCAKE KitchenAid giveaway.

I have 20 KitchenAid Stand Mixers to giveaway & one of them could be yours!


I love using a decent-quality Dutch processed cocoa powder. Dutch processed cocoa powder is darker, less acidic and fudgier in baked goods making it PERFECT for brownies! My go to company is Valrhona but there are lots of great brands out there, including Callebaut, Ghirardelli and lots of organic and fair trade options too!


You have a wide range or chocolate to use for brownies but I suggest sticking with a bittersweet or semisweet chocolate. There’s enough sugar in the recipe so you don’t need a sweet chocolate too.


Stored in a sealed container your uncut brownies will keep for up to four days in the fridge or 2 months in the freezer. Your cut brownies will last up to two days although they rarely last beyond a day if anyone knows they’re there! 


Add an extra yolk for more creaminess and melt one cup of the chocolate with the butter, which you’ll then use in step one below. you can also slightly undercook your brownies so they’ll me even moister.

If you’ve tried this tasty treat then don’t forget to rate the recipe and let me know how you got on in the comments below, I love hearing from you!

Cosmic Brownies

Cosmic Brownies

Prep Time: 5 minutes
Cook Time: 30 minutes
Additional Time: 10 minutes
Total Time: 45 minutes


  • 1 cup white sugar
  • 1 cup brown sugar, packed loosely
  • 3 eggs at room temperature
  • 1 cup cocoa powder
  • 1 cup flour
  • 1 teaspoon salt
  • 1 cup butter, melted
  • 1 & 1/2 tablespoons fresh brewed coffee
  • 1 tablespoon vanilla extract
  • 1/4 cup heavy cream
  • 3/4 cup chocolate chips
  • 1 cup mini M&M's


  1. Preheat oven to 350 degrees.


  1. In a large bowl, combine your melted butter, eggs, vanilla extract, and coffee.
  2. Mix together well on a medium speed.
  3. Add the white and brown sugars to the mixture and blend together well.
  4. Sift cocoa powder, flour, and salt into the bowl and mix until just combined
  5. Add batter to pan and smooth to the edges.
  6. Bake for about 30 minutes or until the center is just set. You'll notice the center does not wiggle when the pan is moved.

Chocolate Ganache

  1. Place chocolate chips into a heatproof bowl.
  2. In a glass measuring cup, pour 1/4 cup of heavy cream and heat for 60 seconds in microwave.
  3. Pour hot heavy cream over chocolate chips and allow to sit for 1 - 2 minutes.
  4. Mix chocolate chips & heavy cream until fully combined and you are left with a silky smooth chocolate ganache mixture. Set aside and allow to cool for 10 minutes.


  1. Start with 1 cup of ganache and pour on top of your brownies. If preferred, you can always add more chocolate ganache.
  2. Smooth over your ganache with an offset spatula.
  3. Sprinkle a generous handful of M&M's over your brownies.
  4. Once your ganache has set, cut and enjoy!


  • Room Temperature Ingredients: Be sure to allow your dairy ingredients to reach room temperature. Room temperature ingredients not only combine more effortlessly (no over-mixing needed) but they also trap air so much better. This trap air will expand and produce a fluffy texture during your baking process.
  • Prepared Pan: There will always be the "next best way to prepare your pan" article. Simply put however, the most effective way i find in my kitchen is a light rub of shortening around the sides, parchment paper on the bottom of the pan, & a very light dusting of flour (cocoa powder for chocolate baked goods) all throughout.

Be sure to subscribe & ring the bell on the MANCAKE baking channel for weekly recipes & tutorials this way you can bake right along with me. Click – MANCAKE YouTube Channel

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More Cake Theme Tutorials👉’s have a Llama Party! I had so much fun working with fondant though more practice will definitely be needed😅 Also been enjoying learning new techniques to share with everyone here so keep sending those comments over on the MANCAKE channel with what you'd like to see make next. I'll see you all very soon with another yummy tutorial so be sure to ring the bell when you subscribe 👉

Posted by Man Cake on Wednesday, July 10, 2019

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