Rich, fudgy Brownies topped with a wonderfully thick, chocolate ganache frosting. These are an amazing homemade copycat version of Little Debbies Cosmic Brownies!

Cosmic Brownies

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Take a trip down memory lane with me: you are in elementary school, sitting in a big cafeteria.

In front of you sits your lunch box, decorated with whatever cartoon character you happened to be in to at the time. As you open the box, you see a sandwich, an apple, maybe a bag of chips, and – yes! – a delicious little treat.

You may see a different treat than me in that box, whatever dessert is most nostalgic for you.

I see a package of Little Debbie’s cosmic brownies.

When I was a kid, I was crazy about cosmic brownies. They were my all-time favorite lunch treat. My mother wouldn’t pack them for me all the time – just for a special occasion. (Like maybe I did well on a test, or finished an assignment, or got an attendance award.)

Finding one of these brownies in my lunch box was a little celebration for me. All of the other kids would beg me to trade with them, the best thing in their lunch box for my cosmic brownies.

But no way! I wasn’t crazy enough to trade away a cosmic brownie.

Now that I’m all grown up, you might think that when I want cosmic brownies Walmart is where I go.

But actually, nowadays I get cosmic brownies from my kitchen.

This copycat cosmic brownies recipe is every bit as chewy, fudgy, and oh-so-yummy as Little Debbie’s original boxed brownies. In fact, this combination of cosmic brownies ingredients yields a snack that is richer, fudgier and has a better chocolate flavor.

And, unlike the original, these brownies contain NO preservative and NO hydrogenated fats – which is an awesome thing in its own right.

If you’ve never had a cosmic brownie before, I want you to have some idea of what this cosmic brownie recipe actually creates. When you think of cosmic brownies Little Debbie is, of course, the next thing you think of.

They created these in the 1950s (which answers that age-old question, “When did cosmic brownies come out?”).  The brownies are a very chewy fudge-brownie, topped with little-candy-coated chocolate pieces.

These nostalgic treats will put a smile on your face, and on the faces of anyone you serve them to.

Serve these as an afternoon snack, or at a potluck or gathering. You are sure to see people’s eyes light up as they say, “I remember these!” and give a big thumbs up as their cosmic brownies review.

Cosmic Brownies

Recipe Notes:

Candy Topping: Of course, what makes a cosmic brownie a cosmic brown is the little candy pieces on top. Without them, it is basically just a fudge brownie (still good, but not technically a cosmic brownie). My go-to candy topping is Wilton Rainbow Chip Crunch. I buy these on Amazon, but you can typically find them anywhere you buy cake-decorating supplies (like Michael’s, Jo-man’s Crafts, or Target/Walmart).

If you can’t find Wilton Rainbow Chip Crunch, or if you’re interested in using a different topping, I would recommend trying mini M&Ms. They’re a great choice – in fact, I actually prefer them (slightly) in flavor to the Rainbow Chips. The only reason that I don’t use mini M&Ms as my normal topping is that the color tends to fade. After you let the brownies sit in the fridge, or if you freeze them, the color of the M&Ms just isn’t as bright – it’s a little bit funky and dull. The Rainbow Chips, however, keep their color.

In a pinch, you could substitute sprinkles (preferably the bright, round sprinkles) for candies. They will not provide the same texture as the Rainbow Chips and mini M&Ms, but they still give off that fun splash of color and slightly candied taste.

If you’re in an experimental mood, you could go totally rogue and try something different altogether. Chopped nuts (like on Little Debbie’s Fudge Brownies), chocolate chips, or chocolate shavings all make yummy toppings for cosmic brownies. Honestly, I’ll occasionally bake the brownies, frost them, and serve them without any adornment whatsoever. (This is the cheapest option. So if, when you’re making cosmic brownies price is an obstacle – you may want to consider serving them plain.)

Frosting: Instead of a plain frosting, this cosmic brownies recipe crowns your brownies in a simple, easy to make, fudgy ganache. (For those who don’t know, ganache is a creamy, chocolate glaze/icing used most commonly in pastries.) The ganache is thick and rich, it cuts nicely when you slice the brownies and compliments, rather than overrides, the taste of the brownies. I strongly recommend that you wait until the ganache sets before cutting the brownies.

Baking: Do not overbake the brownies! If you overbake them, these brownies will not come out moist and fudgy. You want to bake until the center is set and no longer jiggly, but not much longer than that. A toothpick inserted into the center should come out with a few moist crumbs. If the toothpick comes out with streaks or strings of batter still on it, the brownies are not done. However, if the toothpick comes out perfectly clean, the brownies are overbaked and will be dry.

You’ll want to let the brownies cool completely before cutting into them.

Calories: Like any dessert, a cosmic brownies calories are mostly empty calories. They are a dessert. And just like my mom was careful how often she put these in my lunch, a nutritious meal plan will include cosmic brownies sparingly, not as a regular part.

 Freezing: If you want to freeze these brownies, there are a couple of ways you can go about doing it. The standard way is to wrap up the uncut brownies in a double plastic wrap, and then a layer of aluminum foil. To thaw, you’ll remove the plastic wrap and foil, then let the brownies sit out at room temperature for 3-4 hours.

Alternatively, you can cut them into individual pieces and store them Ziploc bags, removing as much air as possible. These bags can go right into the freezer, and the thawing instructions are basically the same.

Mom Tip: consider putting a layer of waxed paper over the brownies before wrapping them up to be frozen. This will keep the frosting in place and also help prevent things from getting watery when the brownies are thawing.

Cosmic Brownies

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Source: Elle’s New England Kitchen

Cosmic Brownies
4.3 from 10 votes

Cosmic Brownies

Rich, fudgy Brownies topped with a wonderfully thick, chocolate ganache frosting. These are an amazing homemade copycat version of Little Debbies Cosmic Brownies!

Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings 6
Calories 706 kcal
Author Kathleen



  • 1 1/4 Cup All-Purpose Flour
  • 3/4 Cup Unsweetened Cocoa Powder
  • 1/2 Teaspoon Baking Powder
  • 1 Tablespoon Cornstarch
  • Pinch Salt
  • 1 1/2 Sticks Butter Melt
  • 2/3 Cup Brown Sugar-Packed
  • 1 Cup Sugar
  • 3 Tablespoons Whole Milk
  • 2 Teaspoon Vanilla Extract
  • 2 Large Eggs

Chocolate Ganache

  • 1 1/2 Cups Semisweet Chocolate Chips
  • 1/2 Cup Heavy Cream


  • Wilton Rainbow Chip Crunch


  1. Preheat oven to 350 degrees. Spray a 9 X13 inch baking dish with nonstick baking spray.
  2. In a small mixing bowl, whisk together flour, cocoa, baking powder, cornstarch and salt and set aside.
  3. In a medium mixing bowl, using a handheld electric mixer beat butter, and both sugars until well combined. Add milk and vanilla and beat until combined. Add eggs one at a time, beating until just incorporated. Gradually add the dry ingredients and mix just until combined. Pour batter into prepared baking dish and bake in preheated oven for 18-22 minutes or until a toothpick inserted in the center comes out with a few moist crumbs. Cool pan on a baking rack.
  4. Meanwhile,  prepare the chocolate ganache. Place chocolate chips and the heavy cream in a microwave-safe bowl. Microwave on high for 1 minute. Whisk together until mixture is completely smooth.
  5. Pour Ganache over slightly cooled brownies.

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Nutritional Information

Nutrition information will vary based on the specific products. To be safe, check the nutrition facts labels of your products. Optional object listed above have been left out of nutritional data.

Nutrition Facts
Cosmic Brownies
Amount Per Serving
Calories 706 Calories from Fat 252
% Daily Value*
Total Fat 28g 43%
Saturated Fat 16g 80%
Cholesterol 85mg 28%
Sodium 48mg 2%
Potassium 558mg 16%
Total Carbohydrates 109g 36%
Dietary Fiber 7g 28%
Sugars 74g
Protein 10g 20%
Vitamin A 8.1%
Calcium 11%
Iron 33.2%
* Percent Daily Values are based on a 2000 calorie diet.