Copycat Cosmic Brownie: A Taste of Nostalgia
Whether you’re recreating a childhood favorite or introducing your kids to a homemade version of yours, these Cosmic Brownies deliver comfort, charm, and just the right amount of whimsy.
Ingredients
For the Brownies:
- 10 tablespoons butter melted
- 1 cup granulated sugar
- ½ cup brown sugar
- ⅔ cup unsweetened cocoa powder
- 2 large eggs plus 1 egg yolk
- 1 teaspoon vanilla extract
- 1 tablespoon light corn syrup
- 1 tablespoon cornstarch
- Pinch of salt
- ¾ cup all-purpose flour
For the Ganache Topping:
- ½ cup heavy cream
- 1½ cups semi-sweet chocolate chips
- Rainbow candy-coated crunch sprinkles
Instructions
Preheat and prepare the pan.
- Preheat your oven to 350°F (175°C). Line an 8x8-inch baking dish with parchment paper, leaving a little overhang on the sides — this makes it easier to lift the brownies out later.
Make the brownie batter.
- In a large mixing bowl, whisk together the melted butter, granulated sugar, brown sugar, and cocoa powder until smooth and glossy. This forms the rich, chocolate base that gives the brownies their signature flavor.
- Add in the eggs, egg yolk, vanilla extract, and light corn syrup. Stir until the mixture is completely combined. The corn syrup helps create that chewy, almost fudge-like texture you remember from the classic Cosmic Brownie.
- Next, add the salt, cornstarch, and slowly fold in the flour until just incorporated. The batter will be thick — don’t be tempted to overmix. You want just enough stirring to bring everything together smoothly.
Bake the brownies.
- Spread the batter evenly into your prepared pan, smoothing the top with a spatula. Bake for 20–25 minutes, or until the edges just begin to pull away from the sides of the pan. The center should still look slightly soft — that’s what gives these brownies their rich, dense texture.
- Remove from the oven and let them cool completely in the pan. (Patience is key here; warm brownies will cause the ganache to melt and lose that perfect glossy finish.)
Make the ganache.
- Once the brownies are cool, heat the heavy cream in a small saucepan over medium heat until it’s just about to simmer — small bubbles should form around the edges, but don’t let it boil.
- Remove from heat and pour the hot cream over the chocolate chips in a heatproof bowl. Let sit for about 1 minute, then stir gently until the mixture becomes smooth and silky. This glossy ganache is what makes these brownies so indulgent.
Top and chill.
- Pour the ganache over the cooled brownies, spreading it evenly to cover the entire surface. Immediately sprinkle a generous layer of rainbow crunch sprinkles over the top — the brighter, the better.
- Refrigerate the brownies for 1–2 hours, or until the ganache has fully set. This step ensures clean slices and that iconic layered look.
Slice and serve.
- Once the ganache is firm, lift the brownies out of the pan using the parchment overhang. Place on a cutting board and slice into 16 neat squares. For perfectly smooth cuts, dip your knife in hot water, wipe dry, and slice cleanly through the ganache each time.
Notes
Tips for the Perfect Cosmic Brownie
- Use quality cocoa powder. It makes a world of difference in flavor and color. A Dutch-process cocoa yields a deep, rich chocolate taste.
- Don’t overbake. The brownies should still be slightly soft in the center when you remove them from the oven.
- Chill completely. Letting the ganache set gives you that glossy, firm topping you remember.
- Add a pinch of sea salt. It enhances the chocolate flavor and adds a touch of sophistication.