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Fudgy Cosmic Brownie Cookies Recipe

4.7 from 119 reviews

These Fudgy Cosmic Brownie Cookies combine the rich, deep flavor of dark cocoa brownies with the fun, colorful vibe of cosmic sprinkles. Soft, chewy, and intensely chocolaty, these cookies are topped with a smooth chocolate ganache and vibrant rainbow chip sprinkles, making them perfect for any celebration or a decadent everyday treat.

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 (Hershey’s Special Dark recommended)
  • 1 ¼ cup all-purpose flour

Chocolate Ganache

  • ¾ cup semi-sweet chocolate chips
  • ¼ cup heavy cream

Toppings

  • Rainbow chip sprinkles

Instructions

  1. Preheat Oven: Set your oven to 350°F (175°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 beat the softened butter, light brown sugar, and granulated sugar together for about 2 minutes until the mixture becomes light and fluffy.
  3. Mix Wet Ingredients: Add the egg, vanilla extract, and light corn syrup. Mix on low speed until everything is fully combined, scraping down the bowl sides to incorporate all ingredients evenly.
  4. Add Leavening and Salt: Incorporate baking soda and salt, mixing for an additional 5-10 seconds to blend well.
  5. Add Cocoa and Flour: Mix in dark cocoa powder and all-purpose flour on medium speed until just combined into a rich, fudgy dough.
  6. Shape Cookies: Using a ¼ cup scoop, portion out the dough into balls. Roll each ball and gently flatten it into a ½ inch thick disc to help the cookies spread and prevent puffiness.
  7. Bake: Place the discs on a baking sheet and bake in the oven for 11-12 minutes. The centers may appear slightly wet but will set as they cool; avoid overbaking to keep the fudgy texture.
  8. Cool: Let the cookies cool completely before adding topping.
  9. Make Chocolate Ganache: Put semi-sweet chocolate chips in a medium heat-safe bowl. Heat heavy cream in the microwave for 30-45 seconds until hot and bubbling, then pour over chocolate chips without stirring immediately. Wait 3 minutes, then stir with a fork until smooth and creamy. If needed, microwave in short bursts on low power until fully melted and combined.
  10. Decorate Cookies: Spoon about 1 tablespoon of ganache on each cooled cookie and sprinkle rainbow chip sprinkles on top.
  11. Chill to Set: Refrigerate the decorated cookies for 30-60 minutes to allow the ganache to harden and intensify the fudgy texture.
  12. Storage: Store cookies in the refrigerator for best texture and flavor, or keep at room temperature up to 2 days for convenience.

Notes

  • Do not overbake the cookies to maintain their fudgy center.
  • Light corn syrup is used to give chewiness and shine but is not the same as high fructose corn syrup.
  • Ensure heavy cream is heated sufficiently but not boiling to make ganache smooth and creamy.
  • Cookies improve in texture and flavor after chilling.
  • Use a cookie scoop for uniform cookie sizes and even baking.

Keywords: fudgy brownie cookies, chocolate ganache cookies, cosmic cookies, chocolate cookies with sprinkles, chewy chocolate cookies