This copycat recipe for Cosmic Brownies is ultra rich, fudgy, and chewy just like the kind you buy at the store but oh so much better with no preservatives!
Tessa's Recipe Rundown...
Taste: These homemade Cosmic Brownies have a much better chocolate flavor than the store-bought ones! No weird artificial flavors here. Texture: Ultra rich, fudgy, and chewy. So good. Ease: Very easy!! Have a batch of these made in just over an hour. Appearance: I think they look pretty darn similar to the store-bought version, if not more mouthwatering. Pros: Super fun copycat recipe that’s so much better when homemade. Cons: Although these are not laden with hydrogenated oils and preservatives like the purchased kind, they still aren’t exactly health food 😉 Would I make this again? Absolutely!
When I was in elementary school anytime I’d bring a sack lunch it was basically the same exact thing every time. I always ate a peanut butter sandwich, I didn’t even like jelly necessarily. There’d usually be some other element in my lunch bag but I’d ALWAYS request my mom add in a Little Debbie brownie.
Before Cosmic Brownies came into existence, it was just the Little Debbie brownies with the nuts on top. I would always pick off all the nuts. In my child mind, nuts shouldn’t be part of any dessert. Gross.
So you could imagine my excitement when I spotted Cosmic Brownies on the shelf at the store. Candy > Nuts any day! I freakin’ loved those Cosmic Brownies.
I knew I had to make my own version from scratch. I got started making the most fudgy, chewy brownies I could, using everything I learned from my Ultimate Brownie Guide.
I even managed to find the exact candies Little Debbie tops the brownies with, they’re Wilton Rainbow Chip Crunch and I found them at Michael’s and I’ve seen them at Joanne’s, but they’re also available by a different brand on Amazon.
I think I managed to create something that will evoke all those childhood memories of snacking on those little plastic-wrapped store-bought brownies. But these babies are SO much better! Real and satisfying chocolate taste with no crazy artificial ingredients.
How to Make FUDGY Brownies
These little brownies are ultra rich and fudgy, almost like candy. I got as close to the texture of the store-bought kind as I possibly could.
Do I have to use cornstarch + corn syrup?
There is a small amount of both cornstarch and corn syrup in this recipe to help make the brownies super chewy and fudgy. Feel free to omit the corn syrup or use golden syrup if you prefer! Your brownies just won’t quite have that same Cosmic texture.
Extra egg yolk = fudgy & chewy!
You’ll notice in most of my brownie recipes I add an extra egg yolk. This adds fat and protein which translates to rich, fudgy, and chewy brownies.
Make sure to measure properly!!!
To get moist, fudgy, and chewy brownies you want to be extra careful to measure your dry ingredients properly. Namely the flour and cocoa powder. I like to use a digital kitchen scale to ensure 100% accuracy. If you don’t have a scale, then use the spoon and level method for both the flour and cocoa powder to ensure you don’t add too much and create dry & crumbly brownies. You can learn more about how to measure properly here.
How to store brownies
These brownies, with the frosting, can be stored in an airtight container for 3 days at room temperature and for 1 week in the fridge. Brownies are best sliced and served chilled for neat squares.
Preheat the oven to 350°F. Line an 8-by-8-inch metal baking pan with parchment or foil and spray with cooking spray.
In a large microwave-safe bowl, melt the butter for about 90 seconds on high power. Stir in the granulated sugar, brown sugar, and cocoa powder. If still very hot, let cool slightly before adding in the vanilla, eggs and egg yolk, and corn syrup. Stir until very well combined. Add in the flour, cornstarch, and salt and stir until just combined. Pour into the prepared pan and bake for 25 minutes. Let cool completely in the pan.
To make the frosting:
Place the cream in a small microwave-safe bowl and microwave on high for 1 minute. Add in the chocolate chips. Let stand for 3 minutes before stirring until smooth. Pour over the cooled brownies and smooth evenly. Sprinkle with the Rainbow Crunch Chips. Refrigerate for 1 to 2 hours, or until the frosting is set, before cutting.
Brownies can be stored in an airtight container for 3 days at room temperature and for 1 week in the fridge. Brownies are best served chilled.
If you make this recipe, be sure to snap a picture and share it on Instagram with #handletheheat so we can all see!
I share trusted baking recipes your friends will LOVE alongside insights into the science of sweets. I'm a professionally trained chef, cookbook author, and cookie queen. I love to write about all things sweet, carb-y, and homemade. I live in Phoenix, Arizona (hence the blog name!)