Crumbl Cosmic Brownie Cookies

Crumbl Cosmic Brownie Cookies Recipe

Sharing is caring!

Hello, dear readers! Today, I’m thrilled to share a recipe that’s bound to become a favorite in your household – Crumbl Cosmic Brownie Cookies. These delightful cookies combine the rich, fudgy goodness of a brownie with the nostalgic joy of rainbow-coated chocolate chips, making them a perfect treat for any occasion.

I first encountered a version of these cookies during a family vacation. We stumbled upon a charming little bakery tucked away in a small town, and the smell of freshly baked goods was irresistible. Among all the delicious treats, their cosmic brownie cookies stood out, and I knew I had to recreate them at home.

This recipe is quite straightforward, but don’t be fooled by its simplicity. The combination of Dutch processed cocoa powder, semi-sweet chocolate chips, and a rich fudge frosting makes these cookies decadently delicious. I love adding a personal touch by sprinkling extra rainbow-coated chocolate chips on top, which not only adds a burst of color but also an extra layer of fun.

Feel free to tweak the recipe to suit your preferences. If you’re a fan of dark chocolate, try using dark chocolate chips instead of semi-sweet. For a festive twist, you can substitute the rainbow chips with holiday-themed sprinkles. These cookies are perfect for sharing with family and friends, whether it’s a cozy evening at home or a festive gathering.

So, preheat your oven and let’s get baking. I promise these cookies will bring a smile to anyone’s face!

How to Prepare Crumbl Cosmic Brownie Cookies


  • 2 cups semi-sweet chocolate chips
  • 1 cup cocoa powder (dutch processed)
  • 2/3 cup cream (heavy)
  • 1 tsp salt
  • 3 large eggs
  • 1 tbsp corn starch
  • 2 tbsp corn syrup
  • 1 1/2 cups light brown sugar
  • 3 3/4 cups all-purpose flour
  • 1 tbsp vanilla extract
  • 1/2 cup white sugar
  • 2 tsp baking soda
  • 1/3 cup chocolate chips (rainbow coated)
  • 1 1/2 cups butter (salted and softened)


  1. Set your oven to preheat at 350°F.
  2. In a stand mixer, combine the softened butter with the brown and white sugars until the mixture becomes light and fluffy.
  3. Blend in the eggs, corn syrup, and vanilla extract until fully incorporated.
  4. Add the flour, cocoa powder, cornstarch, baking soda, and salt, mixing until a soft chocolate dough forms.
  5. Divide the dough into 12 equal portions, each slightly less than 1/2 cup. Shape into balls, flatten into puck-like shapes, and arrange 6 cookies per baking tray lined with parchment paper or a silicone mat.
  6. Bake for 15-17 minutes, until the cookies begin to crack and the centers are no longer wet.
  7. While baking, make the fudge frosting by heating the heavy cream in a microwave-safe bowl for 1 1/2 minutes, until boiling.
  8. Submerge the semi-sweet chocolate chips in the hot cream, letting them sit for 3 minutes before whisking into a smooth mixture. Set aside to cool.
  9. Once baked, let the cookies cool on the pan for 10 minutes. Spread the frosting on each cookie, sprinkling with rainbow-coated chocolate chips while the frosting is still wet.
  10. Enjoy your warm, fudgy treats!


Can I use unsalted butter instead of salted butter for this recipe?

Yes, you can use unsalted butter instead of salted butter. However, you might want to add an extra 1/4 teaspoon of salt to balance the flavors.

Is it possible to substitute the dutch processed cocoa powder with regular cocoa powder?

While you can substitute regular cocoa powder for dutch processed cocoa powder, it may affect the flavor and color of your cookies. Dutch processed cocoa powder is less acidic and gives a richer, darker color and smoother flavor.

How can I store the leftover Crumbl Cosmic Brownie Cookies?

Store leftover cookies in an airtight container at room temperature for up to 4 days. If you want to keep them longer, you can refrigerate them for up to a week or freeze them for up to three months.

What can I do if I don’t have a stand mixer?

If you don’t have a stand mixer, you can use a hand mixer or mix by hand with a sturdy spoon. Just make sure to mix the ingredients thoroughly to get a smooth and well-combined dough.

Can I make the dough ahead of time and bake the cookies later?

Yes, you can make the dough ahead of time and refrigerate it for up to 24 hours. When you’re ready to bake, let the dough sit at room temperature for about 10-15 minutes before portioning and baking.

Is there a way to make these cookies gluten-free?

To make these cookies gluten-free, you can substitute the all-purpose flour with a gluten-free flour blend. Make sure the blend contains xanthan gum or add it separately to help the cookies hold their shape.

Crumbl Cosmic Brownie Cookies Recipe

Crumbl Cosmic Brownie Cookies

Bake these Crumbl Cosmic Brownie Cookies for a festive and tasty dessert. Soft, chocolatey cookies topped with fudge frosting and rainbow-coated chips.
Prep Time 30 minutes
Cook Time 12 minutes
Course Cookies
Cuisine American
Servings 12 cookies


  • 3 eggs
  • 1 1/2 cups brown sugar
  • 1 cup dutch processed cocoa powder
  • 2/3 cup heavy cream
  • 1/3 cup rainbow coated chocolate chips
  • 2 tbsp corn syrup
  • 1 tsp salt
  • 3 3/4 cup all-purpose flour
  • 2 tsp baking soda
  • 1 tbsp vanilla extract
  • 1 tbsp cornstarch
  • 1/2 cup granulated sugar
  • 1 1/2 cups salted butter softened
  • 2 cups semi-sweet chocolate chips


  • Preheat your oven to 350°F.
  • In a stand mixer, blend the butter and sugars until you get a light and fluffy mixture.
  • Add the eggs, corn syrup, and vanilla extract, mixing until well combined.
  • Next, mix in the flour, cocoa powder, cornstarch, baking soda, and salt until you form a soft chocolate cookie dough.
  • Divide the dough into 12 portions, using a bit less than 1/2 cup per portion. Roll each into a ball and flatten slightly like a hockey puck. Place 6 cookies per tray on parchment paper or a silicone mat.
  • Bake for 15-17 minutes until the cookies start to crack and the centers no longer look wet.
  • While the cookies bake, prepare the fudge frosting. Heat the heavy cream in a microwave-safe bowl for 1 1/2 minutes or until boiling.
  • Add the chocolate chips to the hot cream, ensuring they are fully submerged. Let sit for 3 minutes.
  • After 3 minutes, whisk the mixture until smooth and set aside to cool.
  • Once the cookies are done, let them cool on the pan for about 10 minutes. Spoon the frosting onto each cookie and sprinkle with rainbow-coated chocolate chips while the frosting is still wet.
  • Enjoy your warm, fudgy cookies!
Keyword Cookies, Crumbl

Sharing is caring!

Scroll to Top