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Fudgy Cosmic Brownie Cookies Recipe

4.5 from 635 reviews

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.

Ingredients

Scale

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

  1. Preheat Oven: Preheat your oven to 350°F (177°C) to prepare for baking the cookies.
  2. 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.
  3. 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.
  4. Mix Dry Leavening Agents: Add baking soda and salt to the mixture and blend for an additional 5–10 seconds until evenly distributed.
  5. 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.
  6. 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.
  7. 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.
  8. Prepare Chocolate Ganache: Place the semi-sweet chocolate chips in a medium heat-safe bowl.
  9. 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.
  10. 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.
  11. 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.
  12. Decorate Cookies: Spoon about 1 tablespoon of ganache onto the center of each cooled cookie and sprinkle with rainbow chip sprinkles.
  13. Chill Cookies: Refrigerate the decorated cookies for 30–60 minutes to allow the ganache to set and harden.
  14. 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