Fudgy Cosmic Brownie Cookies Recipe
Introduction
These Fudgy Cosmic Brownie Cookies combine rich brownie flavors with a chewy, soft texture and a fun sprinkle topping. Topped with smooth chocolate ganache and colorful sprinkles, they bring a delightful twist to classic cookies that everyone will love.

Ingredients
- ½ cup unsalted butter (softened)
- ½ cup light brown sugar
- ¼ cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 2 tablespoons light corn syrup
- ¼ teaspoon baking soda
- ¼ teaspoon salt
- ½ cup dark cocoa powder (such as Hershey’s Special Dark)
- 1 ¼ cups all-purpose flour
- ¾ cup semi-sweet chocolate chips
- ¼ cup heavy cream
- rainbow chip sprinkles
Instructions
- Step 1: Preheat your oven to 350°F (175°C).
- Step 2: In a large bowl, use an electric mixer on medium-high speed to cream the softened butter, light brown sugar, and granulated sugar together for about 2 minutes, until the mixture is light and fluffy.
- Step 3: Add the egg, vanilla extract, and light corn syrup to the bowl. Mix on low speed until just combined, scraping down the sides of the bowl to incorporate all ingredients evenly.
- Step 4: Add the baking soda and salt, mixing briefly for 5 to 10 seconds until evenly mixed.
- Step 5: Gradually add the dark cocoa powder and all-purpose flour. Mix on medium speed until fully combined into a chocolate dough.
- Step 6: Scoop the dough into ¼ cup (4 tablespoons) portions. Roll each scoop into a ball and gently flatten into discs about ½ inch thick. This helps the cookies spread without becoming too puffy.
- Step 7: Arrange the dough discs on a baking sheet and bake for 11 to 12 minutes. The centers may look slightly wet when done; they will firm up as they cool. Allow cookies to cool completely before decorating.
- Step 8: To make the chocolate ganache, place the semi-sweet chocolate chips in a medium, heat-safe bowl.
- Step 9: Heat the heavy cream in a separate microwave-safe bowl or measuring cup for 30 to 45 seconds until it begins to bubble. Be careful to use a container much taller than the cream to prevent overflow. Alternatively, heat the cream on the stove until it steams.
- Step 10: Carefully pour the hot cream over the chocolate chips without stirring immediately. Press down the chips with a fork so they are fully covered and let sit for about 3 minutes.
- Step 11: After resting, stir the mixture with a fork. It may be thick at first, but continue stirring until smooth and creamy. If the ganache doesn’t fully melt, microwave in 10-second increments at 50% power, stirring between each increment.
- Step 12: Spoon about 1 tablespoon of chocolate ganache onto each cookie, then sprinkle the tops with rainbow chip sprinkles.
- Step 13: Refrigerate the decorated cookies for 30 to 60 minutes to allow the ganache to harden.
- Step 14: For best flavor and texture, keep the cookies refrigerated. They taste even fudgier and richer when chilled.
Tips & Variations
- Use a cookie scoop for consistent-sized cookies and easy shaping.
- Swap semi-sweet chocolate chips for dark or milk chocolate to adjust sweetness.
- Try adding chopped nuts or mini peanut butter cups to the dough for a fun twist.
- If you prefer a vegan version, substitute butter with plant-based margarine and egg with flax egg.
Storage
Store these cookies in an airtight container in the refrigerator for up to one week. The ganache topping stays firm when chilled. To enjoy slightly softer cookies, bring them to room temperature for 10–15 minutes before serving. You can also freeze the cookies for up to 3 months; thaw in the refrigerator before serving.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I make the dough ahead of time?
Yes, the cookie dough can be refrigerated for up to 24 hours before baking. This can enhance the flavor and texture. Just cover it tightly with plastic wrap.
Why do the cookies look wet in the center after baking?
Fudgy brownie-style cookies often have a slightly underbaked center when removed from the oven. This is normal and they will continue to set as they cool, resulting in a soft, chewy texture.
PrintFudgy Cosmic Brownie Cookies Recipe
These Fudgy Cosmic Brownie Cookies combine the rich, intense flavor of dark cocoa with a soft and chewy brownie-like texture. Topped with luscious homemade chocolate ganache and colorful rainbow chip sprinkles, these cookies are perfect for celebrations or any time you crave a decadent treat. The cookies are baked to perfection so they remain slightly gooey in the center, enhancing their fudgy appeal.
- Prep Time: 15 minutes
- Cook Time: 12 minutes
- Total Time: 1 hour 15 minutes
- Yield: 12 large cookies 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
Cookie Dough
- ½ cup unsalted butter, softened
- ½ cup light brown sugar
- ¼ cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 2 tablespoons light corn syrup
- ¼ teaspoon baking soda
- ¼ teaspoon salt
- ½ cup dark cocoa powder (such as Hershey’s Special Dark)
- 1 ¼ cups all-purpose flour
Chocolate Ganache
- ¾ cup semi-sweet chocolate chips
- ¼ cup heavy cream
Decoration
- Rainbow chip sprinkles
Instructions
- Preheat Oven: Preheat your oven to 350°F (177°C) to prepare for baking the cookies.
- Cream Butter and Sugars: In a large bowl, use an electric mixer on medium-high speed to cream together the softened unsalted butter, light brown sugar, and granulated sugar for about 2 minutes until the mixture is light and fluffy.
- Add Wet Ingredients: Incorporate the egg, vanilla extract, and light corn syrup into the creamed mixture on low speed until fully combined. Scrape down the sides of the bowl to ensure even mixing.
- Mix Dry Leavening Agents: Add baking soda and salt to the mixture and blend for an additional 5–10 seconds until evenly distributed.
- Add Cocoa and Flour: On medium speed, combine the dark cocoa powder and all-purpose flour with the wet ingredients until just mixed, forming the cookie dough.
- Shape the Cookies: Using a ¼ cup (4 tablespoons) scoop, portion out the dough, roll each scoop into a ball, and gently flatten each ball into roughly a ½ inch thick disc to encourage spreading during baking.
- Bake Cookies: Place the cookie discs on a baking sheet and bake at 350°F for 11–12 minutes. The centers should still look a touch wet, as they will continue to firm up on the hot baking sheet post-baking. Avoid overbaking to maintain fudginess. Allow the cookies to cool completely before decorating.
- Prepare Chocolate Ganache: Place the semi-sweet chocolate chips in a medium heat-safe bowl.
- Heat Cream: In a separate medium bowl or a large measuring cup, heat the heavy cream in the microwave for 30–45 seconds until it bubbles or on the stove until steaming but not boiling.
- Combine Ganache Ingredients: Pour the hot cream over the chocolate chips without stirring initially. Press down the chips so they are fully covered. Let the mixture sit for about 3 minutes to soften the chocolate.
- Stir Ganache: After resting, stir the chocolate and cream gently with a fork until smooth and creamy. If the mixture hasn’t fully melted, microwave in 10-second increments at 50% power, stirring each time, until fully smooth.
- Decorate Cookies: Spoon about 1 tablespoon of ganache onto the center of each cooled cookie and sprinkle with rainbow chip sprinkles.
- Chill Cookies: Refrigerate the decorated cookies for 30–60 minutes to allow the ganache to set and harden.
- Serve and Store: For the best flavor and texture, keep the cookies refrigerated; chilling enhances their fudgy consistency and richness.
Notes
- Do not overbake the cookies to maintain the fudgy texture; the centers should appear slightly wet when removed from the oven.
- Rolling dough balls lightly flattening them helps cookies spread evenly.
- Use a cookie scoop for uniform size and shape.
- Ganache can be reheated gently if it begins to set before decorating all cookies.
- Store cookies refrigerated to maintain freshness and fudginess, especially if ganache is applied.
Keywords: fudgy brownie cookies, chocolate ganache cookies, rainbow sprinkle cookies, fudgy chocolate cookies, cosmic brownie cookies

