Name: Fudgy Cosmic Brownie Cookies Recipe
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Cuisine: American
Ingredients: 1 cup (2 sticks) unsalted butter, melted; 1 ½ cups granulated sugar; ½ cup brown sugar, packed; 2 large eggs; 1 teaspoon vanilla extract; 1 cup all-purpose flour; ¾ cup unsweetened cocoa powder; ½ teaspoon baking soda; ½ teaspoon salt; ½ cup heavy cream; 1 cup semi-sweet chocolate chips; ¼ cup rainbow candy-coated chocolate chips (like Cosmic Brownie sprinkles)

Jump to Recipe

If you ever wished the magic of those iconic Cosmic Brownies could be bottled up into the perfect palm-sized treat, then this recipe for Fudgy Cosmic Brownie Cookies is going to blow your mind! These cookies deliver everything—fudgy centers, a glossy chocolate ganache topping, and those famous rainbow candy-coated sprinkles—creating a nostalgic, joy-filled bite every single time. Whether you’re baking for a party or treating yourself on a Wednesday afternoon, you’re about to discover why these cookies deserve a permanent spot in your dessert rotation.

Fudgy Cosmic Brownie Cookies Recipe - Recipe Image

Ingredients You’ll Need

The beauty of Fudgy Cosmic Brownie Cookies lies in their straightforward ingredients. Each one serves a vital purpose in crafting dense, chewy cookies with rich chocolate flavor and a picture-perfect finish.

Unsalted butter (1 cup, melted): The gateway to that luxurious, fudgy texture; melting the butter amplifies chewiness and decadence.
Granulated sugar (1 ½ cups): Sweetens the cookie and contributes to its glossy, crackly top.
Brown sugar (½ cup, packed): Adds moisture and a subtle caramel undertone, making each bite extra tender.
Eggs (2 large): Bind the dough and enrich every cookie with a touch of fluffiness.
Vanilla extract (1 teaspoon): Infuses the dough with warm, aromatic depth—don’t skip it!
All-purpose flour (1 cup): The structure-builder bringing all those wet ingredients together in perfect harmony.
Unsweetened cocoa powder (¾ cup): The soul of any classic brownie; choose a good-quality cocoa for major chocolate impact.
Baking soda (½ teaspoon): A key leavener, giving your cookies just the right amount of lift.
Salt (½ teaspoon): Enhances every chocolatey note and balances the sweetness.
Heavy cream (½ cup): Essential for a smooth, rich ganache that oozes over each cookie.
Semi-sweet chocolate chips (1 cup): These melt into the luscious ganache that will crown your cookies.
Rainbow candy-coated chocolate chips (¼ cup): The “cosmic” sparkle! They add crunch, color, and that signature look.

How to Make Fudgy Cosmic Brownie Cookies

Step 1: Preheat and Prep

Let’s get started by preheating your oven to 350°F (175°C). Line a baking sheet with parchment paper—this makes for super easy cleanup and keeps the cookies from sticking. Prepping now means you can sail straight into cookie bliss without interruption.

Step 2: Mix Wet Ingredients

Whisk together the melted butter, granulated sugar, and brown sugar in a large bowl until smooth and silky. Next, add in the eggs one at a time and pour in the vanilla extract. Mix until the batter looks light and glossy—you’re building the fudgy base here!

Step 3: Combine Dry Ingredients

In a separate bowl, sift together the flour, unsweetened cocoa powder, baking soda, and salt. Sifting is the secret to super-even, lump-free cookie dough, ensuring each Fudgy Cosmic Brownie Cookie bakes up with dense, even chocolatey flavor.

Step 4: Bring It All Together

Gradually fold the dry ingredients into the wet mixture. Take your time here and stir just until no streaks remain. Over-mixing can make cookies tough, and we want tender, chewy perfection!

Step 5: Scoop and Bake

Using a cookie scoop or two spoons, drop well-rounded mounds of dough onto your prepared baking sheet, leaving about 2 inches between each. Bake for 8–10 minutes until set on the edges but still soft in the centers. They’ll firm as they cool, so don’t overbake!

Step 6: Cool Completely

Let the cookies rest on the baking sheet for about 5 minutes before transferring to a wire rack. This lets them set up and makes sure they’re sturdy enough to handle the glorious ganache coming their way.

Step 7: Make the Ganache

Heat the heavy cream in a small saucepan on the stove until it’s just steaming—don’t let it boil. Pour the hot cream over the chocolate chips in a heatproof bowl and let it sit for 2 minutes. Stir until you get a glossy, luscious ganache.

Step 8: Decorate with Sprinkles

Spoon or drizzle the chocolate ganache generously over each cookie, then immediately shower with rainbow candy-coated chips. The sprinkles will stick perfectly to the warm ganache, adding that cosmic wow factor.

Step 9: Let Them Set

Let the ganache firm up for a bit at room temperature before serving, if you can resist the temptation. Once set, your Fudgy Cosmic Brownie Cookies are ready to enjoy—fudgy centers, glossy tops, and sweet, crunchy rainbow bits in every bite.

How to Serve Fudgy Cosmic Brownie Cookies

Garnishes

Besides the signature rainbow sprinkles, try a dusting of flaky sea salt or an extra drizzle of melted white chocolate for a gorgeous finish. You can even tuck a few extra sprinkles onto each cookie just before the ganache sets for maximum color and crunch.

Side Dishes

Pair your Fudgy Cosmic Brownie Cookies with a tall glass of cold milk, rich espresso, or a scoop of vanilla ice cream. For special occasions, serve them alongside a berry salad or fresh fruit for a pops of color and brightness.

Creative Ways to Present

Stack them high on a retro-inspired cake stand, pack them into a colorful tin as a homemade gift, or turn them into ice cream sandwich cookies for a playful twist. An assorted platter of mini cookies is also a show-stopper for parties or bake sales!

Make Ahead and Storage

Storing Leftovers

For the freshest experience, store leftover cookies in an airtight container at room temperature for up to 4 days. Just be sure they’re completely cooled and the ganache is set to avoid stickiness.

Freezing

Fudgy Cosmic Brownie Cookies freeze beautifully! You can freeze the baked cookies (with or without ganache) in a single layer before transferring to a freezer bag. They’ll keep for up to 2 months—perfect for unexpected cravings or last-minute celebrations.

Reheating

To enjoy warm cookies, simply pop them in a 300°F oven for 3–4 minutes or give them a quick zap in the microwave (10–15 seconds should do it). If frozen, let them thaw at room temperature before reheating for the best texture and taste.

FAQs

Can I use Dutch-processed cocoa powder instead of natural?

Absolutely! Dutch-processed cocoa adds a deep, mellow chocolate flavor that works beautifully in these cookies. Just keep in mind it may produce slightly less rise than natural cocoa, but the cookies will still be wonderfully fudgy.

How do I keep my cookies super soft and fudgy?

Don’t overbake! Pull the cookies from the oven when the edges are set but the centers still look a little soft. This is key for maintaining that classic fudgy texture inside.

Can I double the recipe for a crowd?

Yes, this recipe doubles like a dream. Just mix the dough in a very large bowl and bake in batches, making sure not to overcrowd your baking sheets for even cooking.

What if I don’t have rainbow candy-coated chips?

No worries! Substitute with regular mini M&Ms, colored sprinkles, or even chopped candy bars for a similar playful look and extra crunch.

Can I make the dough ahead of time?

Definitely—prepare the dough up to 24 hours in advance, cover tightly, and refrigerate. Let it sit out for 20–30 minutes to soften before scooping and baking. The cookies might even bake up thicker after a chill!

Final Thoughts

If you’re looking for a dessert that’s as much fun to make as it is to eat, you can’t beat these Fudgy Cosmic Brownie Cookies. Every batch brings back sweet memories and spreads pure happiness. Don’t wait for a special occasion—treat yourself and see why this recipe is a true crowd-pleaser!

Fudgy Cosmic Brownie Cookies Recipe

★★★★★

5 from 12 reviews

Author: Mariam
Total Time: 30 minutes
Yield: Makes about 24 cookies 1x
Diet: Vegetarian

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Description

Indulge in the cosmic delight of these Fudgy Cosmic Brownie Cookies that blend rich chocolate flavors with colorful candy sprinkles for a truly out-of-this-world treat.

Instructions

Preheat the oven: Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
Make the cookie dough: Whisk together melted butter, granulated sugar, and brown sugar. Add eggs and vanilla extract, mix well.
Combine dry ingredients: Sift together flour, cocoa powder, baking soda, and salt. Gradually add to wet mixture, stir until combined.
Scoop and bake: Drop dough onto baking sheet, bake for 8-10 minutes until set but soft.
Cool the cookies: Rest on sheet for 5 minutes, transfer to wire rack to cool.
Prepare the ganache: Heat cream until steaming, pour over chocolate chips, let sit for 2 minutes, then stir until smooth.
Decorate: Spoon or drizzle ganache over each cookie, sprinkle with rainbow candy-coated chips.
Let set: Allow ganache to firm up before serving.

Prep Time: 20 minutes
Cook Time: 10 minutes
Category: Dessert
Method: Baking
Cuisine: American